Perhaps he was agonizing over the moral issues involved...
也许他正在为其中牵扯的道德问题而伤脑筋。
Even now the thought of it agonizes me .
时至今日,回想起来,仍然难过。
He agonizes over every decision he has to make .
他对每一项必须作出的决定都极为痛苦。