adj
1 unnatural, forced and artificial; not easy or relaxed 不自然的; 勉强的; 造作的; 紧张的
*astrained laugh 勉强的笑
* strained relations, ie unpleasanttension between people, groups or countries 紧张的关系（人际、团体或国家之间的）.
2 overtired and anxious 过度疲劳和焦虑的; 心力交瘁的
*She looked very strained when I last saw her. 我上次看见她时, 她显得非常憔悴.

adj
a strained situation or behaviour is not relaxed, natural, or friendly
= tense
　I couldn't stand the strained atmosphere at dinner any more.
　the increasingly strained relations between the French and German governments
showing the effects of worry or too much work
　Nina's voice sounded strained.
　Alex's pale, strained face