strained
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.