There are many different strains of flu virus.

Overcrowding imposes mental strains.

过度拥挤使精神紧张.

Host specialization of strains is present in one geographical locality.

在某一地理场所菌系具有寄生主的专化性.

They strained their eyes, but saw nothing.

他们瞪大了双眼，但什么也没看到。

Her face looked strained and weary.

她的脸色显得憔悴疲惫。

He strained after learning with all his might.

他竭尽全力地进行学习.

Gil sensed something wrong from her father's strained voice.

吉尔从父亲紧张的声音中感觉到出了什么事了。

She looked a little pale and strained.

她看起来面色有点苍白，神情忧虑。

His laughter seemed a little strained.

他的笑声好像有点不自然。

Relations are rather strained at present.

目前关系有些紧张.

She looked rather strained and miserable.

她看起来紧张而痛苦.

The relations between the two countries are strained.

两国关系紧张.

His voice had lost its resonance; it was tense and strained.

他的声音不再洪亮，而是显得紧张，不太自然。

Relations between the two countries had become severely strained.

两国关系已经变得非常紧张.

Elsewhere throughout the central building the concrete frame was severely strained and cracked.

整个中间大楼的所有地方,混凝土构架严重变形和开裂.

The two countries have a history of strained relations since the 1979 Iranian revolution.

这两国关系自一九七九年伊朗革命以来,便陷入停滞不前的状态.

The atmosphere remained somewhat strained all evening.

整个晚上气氛一直有点儿紧张.

Little by little she lost the taut, strained air of perpetual anxiety.

长期焦虑带来的紧张而疲惫的神色从她脸上慢慢消失了。

He realized that she was too strained.

他意识到她太紧张了.

Responsible for maintaining the books up-to-date according to existing manuals revision pro-gram.

根据现存的手册审核日期负责保持所有手册及时更新.

Paper printing: publications, hardbound picture albums, product manuals, stick-on trademarks, placards etc.

各类纸张印刷系列: 出版刊物 、 精装画册 、 产品说明书 、 不干胶商标 、 宣传海报等.