species impoverishment

The ultrastructure changes of endosperm during degeneration process and its function to development of embryo in watermelon;

西瓜胚乳衰退过程中的超微结构变化及其对胚发育的作用

Ultracytochemical Localization of Acid Phosphatase in Nucellar Cells of Wheat During Degeneration ;

小麦珠心细胞衰退过程酸性磷酸酶的超微细胞化学定位(英文)

Analysis on current situation and degeneration reasons of sweetfish resource(Plecoglossus altivelis) in Zhejiang province

浙江香鱼资源现状与衰退原因分析

It can also imply a recovery from some kind of slump or period of quietude.

它也暗示了从某种衰退或是沉寂期的恢复。

This decline in vigour with the passing of time is called ageing.

这种随着时间流逝的活力衰退就叫做衰老。

epilepsy characterized by clonus of muscle groups and progressive mental deterioration and genetic origin.

肌肉抽筋大脑逐渐衰退的一种癫痫。

He is 90 but still retains the use of all his faculties.

他已90高龄,但各种官能仍未衰退。

Theories abound for the decline of the sitcom.

市面上充斥着对于情景喜剧衰退的种种看法。

This decline in vigor with the passing of time is called ageing.

这种随着时间的流逝而精力衰退的现象我们称为衰老。

A translucent product of some degenerative skin conditions.

透明角质皮肤衰退时分泌的一种半透明产物

One of the most frequent of these disorders is severe hypothyroidism (which should not be confused with mild hypothyroidism ).

这些小病中最常见的一种是甲状腺机能严重衰退(不应把它同甲状腺机能轻度衰退相混淆)。

The process of degenerating.

衰退堕落或退化过程

To undergo degeneration.

经历退化、衰退、堕落.

Of or relating to a recession.

后退的，衰退的后退的与后退有关的

Nothing is fixed and permanently stable. There must be movement forward, which is progress of a sort, or movement backwards, which is decay and deterioration.

任何事情都不是永恒的、一成不变的，必然会有前进，即某种进步； 也会有倒退，即衰退及退化。

The labour market is weakening at a pace that has in the past heralded recession.

劳动力市场以某种速度变弱，过去这种速度就已经预示出衰退。

The evolutionary decline or loss of a function, characteristic, or structure in an organism or a species.

退化（作用）一个生物体或物种的某种功能、特征或结构由于进化作用造成的衰退或丧失

Recent studies have suggested that exercise benefits both brawn and brain.

“然而，这种大脑功能的改善，一旦跑步者停止锻炼就会衰退。

Study on the Regularity of Vigor Loss During Storage And Characteristic Change of Rice Seeds

水稻种子贮藏过程中活力衰退规律及性状变化初探

a glandular disorder caused by failure of function of the cortex of the adrenal gland and marked by anemia and prostration with brownish skin.

由于肾上腺皮层功能衰退引起的一种腺体疾病，明显标志是贫血症和衰竭，皮肤呈褐色。

The economy has dipped into a serious recession

经济已陷入严重的衰退。