material alteration
英 [məˈtɪəriəl ˌɔːltəˈreɪʃn]
美 [məˈtɪriəl ˌɔːltəˈreɪʃn]
重要变更，实质性变更
双语例句
- The application content shall cover the alteration item asked for, the reason for alteration, and the material related to the alteration item applied for shall be furnished.
申请的内容应当包括要求变更的事项、变更的理由，并提供与申请变更事项有关的材料。 - Where a licence has been granted, the Licensee shall not, thereafter, save with the permission in writing of the director, make any material alteration or modification to the primary enclosure, housing facilities or outdoor area.
凡牌照一经批给，持牌人除非获处长书面许可，否则不得在批给后对基本围封物、畜舍设施或户外范围作出任何重大的更改或修改。 - Petrological and mineralogical examinations of core material can be used to identify hydrothermal alterations. Wall Rock Alteration and Its Relations to Gold Mineralization of the Liba Gold Deposit, Gansu Province
岩芯的岩石学和矿物学研究也能用来鉴定水热蚀变。甘肃李坝金矿围岩蚀变与金成矿关系 - It is thought that hydrolysis of tuffaceous material and secondary alteration of feldspars and rock debris are two main factors responsible for the high content of clay minerals.
凝灰质的水解蚀变及长石和中、酸性岩屑在成岩过程中的次生变化是造成海拉尔地区粘土含量高的主要原因。 - Objective To explore the mechanism, material fundamental of synapse plasticity and acupuncture's efficacy by watching the alteration of SYP after cerebral infarction and acupuncture treatment.
目的观察大鼠脑梗死及电针干预后突触素（SYP）的动态变化，探讨突触可塑性的物质基础、机制及针刺的影响。 - With the well-know application technique of earth composed material, the application of earth composed material in the construction of the urban roads, especially in the alteration of old roads, is more and more.
随着土工合成材料应用技术的成熟，在城市道路建设中特别是旧路改造时的土工合成材料应用越来越多。 - So here we put forward the ceramic accumulation heat ball as the first choice of the material of accumulation heat furnace, and the decentralization commutation combustion method, which are all have the guide function for the selection and alteration of accumulation heat furnace.
所以本文提出采用陶瓷蓄热球作为加热炉的蓄热材料，以及分散换向式燃烧方式，对蓄热式加热炉的选型及改造具有较强的指导意义。