小学 elementary school; 初中 middle school or junior high; 高中 high school. 大学是 college or university, 二者区别在于 university 是大学，大学由几个学院组成，这些学院叫 college。本科是 undergraduate, 研究生院是 graduate school.
博士是
step 系列一：take baby steps 缓慢的，逐步的。she is taking baby steps towards recovery after the surgery.
手术后，她慢慢恢复。step by step 一步步地。i'll show you how to do it step by step.
我一步步教你怎么做。晚上天黑，送客人出门，要提醒客人，watch your step. 小心脚底下。
step 系列二：step inside/step outside. 进来/出去。
step inside my office please. i need to h**e a word with you. 到我办公室来，我有话跟你说。
i need to step outside for a smoke. 我出去抽根烟。let's step outside for a moment.
i want to show you something. 出去一下，我给你看点东西。
step 系列三： step on someone's toes 踩到某人的脚趾头，干涉到别人的事，得罪人。that's his territory.
i don't want to step on his toes. 那是他的权限范围，我可不想管太宽，得罪他。step on the gas/step on it 快点！
joan, we're gonna be late. step on it! joan，我们要晚了，快点。
step 系列四。step up to the plate 准备好做某事。it's time for the government to step up to the plate and ensure food safety.
**应该采取行动，保证食品安全。thank you for stepping up to the plate and volunteering at last week's event. 谢谢你在上星期的活动中无偿贡献自己的时间。
pull 系列一。pull for someone 支持某人。go for it.
i'll be pulling for you. 加油，我支持你。most people in the stadium are pulling for the home team.
体育馆里大多数人都为主场球队加油。i am pulling for the underdog. 我替处于劣势的一方加油。
pull 系列二。pull oneself together 振作精神。i know it's hard for you, but you h**e to pull yourself together and get through this.
我知道你现在很难，但你还是要振作起来，渡过难关。don't give up so easily. pull yourself together and try again.
别轻易放弃，振作精神再试一把。
pull 系列三。pull a muscle 肌肉拉伤。i pulled a muscle in my back doing yard work yesterday.
我昨天在园子里干活的时候把后背肌肉拉伤了。pull someone's leg 故意逗某人。don't believe what he said.
he was just pulling your leg. 别信他的话，他逗你玩呢！
pull 系列四。pull a fast one on someone 骗某人。i can't believe she pulled a fast one on me.
我不敢相信她居然把我骗了。don't try to pull a fast one on me. i'm not stupid.
别想骗我，我不傻。 you've got to trust me. i'm not trying to pull a fast one on you.
你要信我，我不是想骗你。
pull 系列四。pull a fast one on someone 骗某人。i can't believe she pulled a fast one on me.
我不敢相信她居然把我骗了。don't try to pull a fast one on me. i'm not stupid.
别想骗我，我不傻。 you've got to trust me. i'm not trying to pull a fast one on you.
你要信我，我不是想骗你。
belt 系列一。tighten one's belt 勒紧裤腰带。joe had to tighten his belt after he was let go.
joe 被解雇后，只好勒紧裤腰带，节省开销。things are costing more and more these days. we h**e to tighten our belt.
现在东西越来越贵，我们只好省着点过日子。
belt 系列二。under one's belt 做过某事，有某种经验。she has 15 years of teaching experience under her belt.
她有15年的教学经验。with three award-winning commercials under his belt, it'll be easy for him to find a new job. 他制作的三个广告都拿过奖，找个新工作对他来说应该不在话下。
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