sag

verb

1. （尤指由于承重或受压）中间下垂，下凹
   to hang or bend down in the middle, especially because of weight or pressure
   1. a sagging roof
      凹陷的房顶
   2. The tent began to sag under the weight of the rain.
      雨水使得帐篷中间开始下坠。
   3. Your skin starts to sag as you get older.
      人老了，皮肤就会慢慢松弛。
2. 减弱；减少
   to become weaker or fewer
   1. Their share of the vote sagged badly at the last election.
      在上次选举中他们的得票数大幅下跌。

1. VERB (中间部分)下垂，下弯，下陷
   When something sags, it hangs down loosely or sinks downwards in the middle.
   1. The shirt's cuffs won't sag and lose their shape after washing...
      这件衬衫的袖口洗后照样挺括，不变形。
   2. The roof sagged at one corner, where the ceiling beams had snapped with rot...
      房顶的一角塌了下来，那里的天花板横梁已经腐烂断裂了。
   3. He sat down in the sagging armchair.
      他在凹陷的扶手椅上坐下了。
2. VERB (身体某部位)松弛，下垂
   When part of someone's body begins to sag, it starts to become less firm and hang down.
   1. He is heavily built, but beginning to sag.
      他体形健壮，但肌肉已经开始松弛。
   2. ...flabby thighs and sagging bottoms.
      软塌塌的大腿和松垂的臀部
3. VERB 消衰;委顿;萎靡
   To sag means to become weaker.
   1. The pound continued to sag despite four interventions by the Bank of England...
      尽管英格兰银行四次出手干预，英镑仍不改颓势。
   2. Some of the tension Altman builds up starts to sag...
      奥尔特曼制造的一些紧张氛围开始缓解。
   3. They failed to revive her sagging spirits.
      他们未能让她从萎靡消沉中振作起来。

1. The shirt's cuffs won't sag and lose their shape after washing
   这件衬衫的袖口洗后照样挺括，不变形。
2. The roof sagged at one corner, where the ceiling beams had snapped with rot
   房顶的一角塌了下来，那里的天花板横梁已经腐烂断裂了。
3. He sat down in the sagging armchair.
   他在凹陷的扶手椅上坐下了。
4. He is heavily built, but beginning to sag.
   他体形健壮，但肌肉已经开始松弛。
5. The pound continued to sag despite four interventions by the Bank of England
   尽管英格兰银行四次出手干预，英镑仍不改颓势。
6. Some of the tension Altman builds up starts to sag
   奥尔特曼制造的一些紧张氛围开始缓解。
7. They failed to revive her sagging spirits.
   他们未能让她从萎靡消沉中振作起来。
8. We need to do something about the sag.
   我们须把下沉的地方修整一下。
9. The shelf was beginning to sag beneath the weight of the books upon it.
   书架在书的重压下渐渐下弯。
10. This old couch is starting to sag in the middle.
    这张旧长沙发中间开始下陷了。
11. The types and characteristics of the sedimentary facies developed in Pukou formation of Upper Cretaceous in Huaiyin sag of Yanfu depression are analyzed.
    对盐阜坳陷淮阴凹陷上白垩统浦口组发育的沉积相类型及其特征进行了分析。
12. Qingxi sag and Ying'er sag are the two oil-enriched sags in Jiuquan basin with large potentials for exploration.
    酒泉盆地青西凹陷和营尔凹陷是两个富油凹陷，具有较大的勘探潜力。
13. As one of the major problems of modern power quality, voltage sag will bring huge economic losses.
    电压暂降作为现代电能质量的主要问题之一，会带来巨大的经济损失。
14. Parabolic cable element was applied in this method to sufficiently consider the effects of sag.
    同时采用抛物线索单元，考虑了索的垂度效应。
15. During transmission line construction, sag observation is an important control item of stringing.
    在输电线路施工中，弧垂观测是架线分部工程中重要的控制项目。
16. The chair seat had a slight sag. Her eyes have sunk.
    椅子的座位略微下陷。她的眼睛凹陷下去了。
17. Research on a new method of voltage sag measure and voltage compensation strategies.
    一种新的电压凹陷检测及其补偿控制策略研究。
18. The main exploration bodies of Minhe basin is consisted of Bazhou and Yongdeng sag.
    民和盆地勘探主体包括巴州凹陷和永登凹陷。
19. Upper Tubes-32mm, 7000 series straight wall aluminium, low friction anodized with sag gradients.
    上管-32毫米，7000系列直壁铝，低摩擦与凹陷梯度阳极。
20. With special lithofacies paleographical setting in Qikou sag, a lot of lithostratigraphic traps form.
    歧口凹陷区特有的岩相古地理环境，形成了大量的岩性地层圈闭。
21. Coal-Formed Gas Reservoir-Cap Rock Combinations Analysis of Permian in Zhanhua-Chezhen Sag, Jiyang Depression;
    沾化-车镇凹陷二叠系为煤成气储集层的主要发育层段。
22. The characteristics of distribution, lithology, geology and seismic response of the lithology anomalous body in the Tertiary Wenchang Formation of Enping Sag in Pearl River Mouth Basin were studied.
    对珠江口盆地恩平凹陷下第三系文昌组大套暗色泥岩中的“异常岩性体”的分布、岩性、地质背景和地震响应等特征进行了研究，结果表明该异常体为沉积浊积体。
23. Oujiang sag is a dustpan-like depression of faulting in east and overlapping in west.
    东海瓯江凹陷是一个东断超的箕状凹陷，凹陷内同生断层和潜山等局部构造发育。
24. The Banghu Sub-Sag is the depositional and subsidence center of the Qianjiang Formation in Qianjiang Sag.
    蚌湖洼陷是潜江凹陷潜江组的沉积、沉降中心，其两侧砂体的成因与分布是一个有争议的问题。
25. Application of the integrated exploration methodology in the research of subtle reservoirs in Dainan Fm of Jinhu sag, Subei basin, shows that it is practical and effective.
    苏北盆地金湖凹陷戴南组的隐蔽油气藏研究表明了综合勘探方法的实用性和有效性。
26. Research on sedimentary facies and reservoir characteristics of Lower Cretaceous in Eastern Wushi sag, tarim Basin
    塔里木盆地乌什凹陷东部下白垩统沉积相及储层特征研究
27. The south step-fault zone in Gaoyou sag is the major oil producing area in Jiangsu oilfield.
    高邮凹陷南断阶带地区是江苏油田的主要产油区。
28. As a result, the skin may sag.
    结果，皮肤就松弛下垂了。
29. Faults development is the main characteristic of central uplift belt in the Dongying Sag of BohaiBay Basin.
    断裂发育是渤海湾盆地东营凹陷中央隆起带的主要特征。
30. The Beipu Area is structurally located at the west part of Nanpu sag, Huanghua depression.
    北堡地区区域构造上位于黄骅坳陷南堡凹陷西部，是南堡凹陷勘探的重点地区。

v.

sb's jaw dropped/fell/sagged

• （突然吃惊或失望得）张口结舌，目瞪口呆，垂头丧气
  used to say that sb suddenly looked surprised, shocked or disappointed

noun

1. a shape that sags
   1. there was a sag in the chair seat

   Synonym:    droop

verb

1. droop, sink, or settle from or as if from pressure or loss of tautness

   Synonym:    droopswagflag

2. cause to sag
   1. The children sagged their bottoms down even more comfortably

   Synonym:    sag down