A so-called silent disease, osteoporosis is progressive and*. consequence of aging. 所谓的无声的病,骨质疏松症,是日益严重的,常常被错误地理解成是衰老的一个自然结果。
A fault-tolerant system experiences a crash due to hardware components faults or progressive performance degradation as an "aging" phenomenon, because of running continuously for very long periods. 容错系统不仅会产生硬件故障,由于连续长时间的运行,系统的性能也会逐渐下降或失效,即老化现象。
Alzheimer's disease ( AD) is one of the most severe and most common progressive neurodegenerative diseases of aging. 阿尔兹海默病(Alzheimer'SDisease,AD)是现代社会中最常见的老年性中枢神经系统疾病之一。
Ataxia Telangiectasia ( AT) as a genetic disorder results from single gene mutation, characterized by radiosensitivity, progressive nerve degeneration, immunodeficiency, premature aging and cancer predisposition. 共济失调性毛细血管扩张综合症(AT)是一种单基因突变引起的遗传性疾病,表现为高辐射敏感性、进行性神经退变、免疫缺陷、早衰及易患癌症等。
Its universality, endogenous, cumulative, progressive and hazardous characteristics is more accepted. At present the mechanism of aging research is still contending, the flourishing period, and traditional Chinese medicine and Western medicine have their own strengths. 其普遍性、内因性、积累性、进行性及有害性是目前较为公认的特点。目前对于衰老机制的研究正处于百家争鸣、百花齐放的时期,且中西医各有所长。
The main causes are that the decrease of testicular function with aging is of a progressive course without a cut-point, and the serum level of T in the aging male has markedly individual variation. 主要原因是男子的睾丸功能与女性的卵巢不同,没有一个明确的终止界限,同时,健康老年男子的血浆T水平有较大的个体差异。