Get something out of your system “让什么东西离开你的身体”这个表达的实际意思是发泄。把藏在心中许久或忍耐很长一段时间的事情说出来，释放一下。
I’m sorry for shouting at you, but I had to get it out of my system. I hate it when you don’t take your shoes off in the house. I should have mentioned something before.
I had a good cry this afternoon. I think I’ve finally got the break-up out of my system.
短语 work the system 的意思是某人很会钻规章制度的空子、漏洞从而给自己牟利。
He really knows how to work the system. He never seems to do much actual work but he’s gone from junior clerk to department head in only a couple of years.
If you know how to work the system you can get away with paying very little tax, completely legally.