Losing a spouse is an unbearable pain.

失去配偶是无法忍受的疼痛。

I'll faint from this unbearable pain in my stomach.

我会因为受不了胃部的疼痛而晕倒的。

When love become unbearable pain, memory choose to forget.

当爱成为难以忍受的疼痛，记忆选择忘记的。

When love becomes unbearable pain, memory chooses to forget.

当爱变为无法承受的痛苦，记忆选择遗忘；

The most unbearable pain in the world is to be parted in life, and separated by death.

世界上最令人悲痛难忍的，莫过于生离和死别。