you cannot squeeze blood out of a turnip（蘿蔔） means you cannot get something from a person that he or she is not willing or able to give.
separating the wheat from the chaff（糟糠） means keeping what is valuable and rejecting what is worthless.
forbidden fruit tastes the sweetest. That means some people get pleasure from doing something that they are not supposed to do.
if you go bananas, you are wild with excitement or worry.
If life gives you lemons, make lemonade. This means you should always try to make the best of a bad situation.
