as a last resort：what one does when there are no other options（别无他选时的决定
，比如你有个朋友家境一般，只有在迫不得已的时候才和家里要生活费，就可以说：He would only ask his parents for money as a last resort.
） establish (or set) boundaries：to set expected rules of behavior in a relationship（在交往中划清界限
，比如你觉得有个异性找你聊天太频繁了，你却不想发展太深的关系，就说：It puts me in a tough spot. 你朋友却说：You need to establish boundaries.
） get off on the wrong foot：to make a bad start with something, often a relationship, job, or task（第一步就走错了，表示 一开始就没做好
，比如你朋友工作第一天就迟到了，留下了不好的印象，就说：She got off on the wrong foot at her new work by showing up late the first day.
） get reassigned：to switch to a new roommate; to appoint someone to a different role（换室友，让某人角色不同，比如你觉得和现在的室友合不来
，就说：I don't get along with my roommate, so I put in a request to get reassigned.
） have one's back：to be ready to support or defend someone（做别人坚实的后盾，支持别人
，比如你朋友最近很低落，你就说：Misery loves company. If you need any help, then just call me. I have your back.
） keep one's paws off：to not touch（拿开你的爪子，别动，别碰
，比如你妹妹看到一个大蛋糕
，想吃一口，你妈妈就说：Keep your paws off the cake! It is supposed to be eaten at dinner.
） lame ass：bad, boring（不好的，蹩脚的，无聊的，
用来加强语气，比如你朋友在考试前一天想组织大家出去玩，你就说：What a lame ass idea!
） loosen up：to be less stressed or strict, to relax（放松，要求别太高，比如你拒绝了你朋友出去看电影，你朋友就说：You're so stressed these days and you get definitely an idea of loosening up!
） over the top：excessive,extreme（都已经上房顶了，就是 特别，及其，过头了
，比如你有个同学学习太用功了，连睡觉时间都减少了很多，你就说：He can be over the top. In that way, he'll be a absolutely nerd.
） What's on your mind? ：What's the problem? What do you want to talk about?（怎么了，你想啥呢？
比如你朋友看起来闷闷不乐的，你就说：Excuse me, what's on your mind?
） blast：to play very loudly（音乐放得很大声
，比如你邻居天天放音乐，特别吵，你就说：My neighbor blasts heavy metal music until late at night. I could barely sleep!
