v.痛苦，疼痛
Can you imagine that your pet may be in pain and you might not know it?───你能想像，你的宠物可能会在痛苦和你可能不知道呢？
is unpleasant to be in pain.───痛苦中是不愉快的一件事。
It's that simple: the argument must end because another person may be in pain.───道理很简单,争吵必须终止,因为其中一人可能已被触动内心的痛处.
Unfortunately, he has suffered from esophageal cancer and looks to be in pain.───他不幸得了食管癌,现在看着真是受罪.
Finally, Old Xu came out, limping. He seemed to be in pain.───最后, 老许一瘸一拐地出来了, 他看上去好像很痛苦.
Because my heart would be in pain.───因为我的心将痛苦。
We knew she must be in pain, despite her stoic attitude.
burning pain───灼痛；烧痛
lie in wait───埋伏以待
period pain───痛经
case in point───恰当的例子
back pain───背痛
be in for───必定遭到；参加
be in love───在恋爱
be in luck───运气好；走运
be in with───得到(某人)欢心；与(某人)是一伙，与(某人)狼狈为奸；和…接近，和…亲近；和…很熟