pain 是不可数名词，意为：痛苦；刻苦；令人厌烦的人[事物]；身体某部分的疼痛[不适]。
例句：The pain was almost more than he could bear.
这种痛苦几乎使他无法忍受。
This should help reduce the pain.
这个应有助于减轻痛楚。
It pains me to see you like this.
看到你这副模样真令我难过。
She was clearly in a lot of pain.
她显然疼痛万分。
The couple went to great pains to keep their plans secret.
这对夫妇煞费苦心，对计划守口如瓶。
Back pains can be the result of bad posture.
腰背疼可能是不良姿势造成的。
I never meant to cause her pain.
我从没有让她痛苦之意。
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