11 Be in a black mood 情绪极差

To be so negative about everything that it is impossible for anyone to reason with him/her

Example: My father has been in a black mood for days, we dare not say anything to him.

12 New blood 新成员

New people brought into an organization to introduce different and original ideas

Example: It was decided¹ to bring new blood into the school by employing teachers with the latest training.

13 Feeling blue 感到无精打采

Feeling sad or depressed²

Example: She’s feeling blue, because the man she loves is far away.

14 Get to the bottom of something 弄清真相

To find out the truth about something

Example: I’m trying to get to the bottom of why David left without saying goodbye.

15 A piece of cake 轻松的事

Something which is very easy to do

Example: Here…let me put the batteries in for you. It’s a piece of cake.