I know how you feel, but there's no need to go on and on about it.
我知道你的感受,可是也没必要这样没完没了。
Prosperity gains (or makes) friends, and adversity tries them.
顺境交朋友,逆境试真情。
Marine Studio biologists have pointed out that, however intelligent they may be, it is probably a mistake to credit dolphins with any motive of lifesaving.