甚至在买一盒牛奶时他们都必须进行复杂的权衡：如果我买了牛奶，我就买不起果汁了。
They have to make complicated trade-offs when buying a carton of milk: If I buy milk, I can't afford orange juice.
我必须对于零食问题想出一些策略，比如只买一点点或者在家里就不放任何吃的。
I had to learn strategies around snacking, such as only buying single-serve portions or simply not bringing certain foods in the house.
我的退休金暴跌，现在必须去买一份年金（annuity）了。
上星期五，我想要去为我的朋友约翰买一份生日礼物。但是我必须等我的妈妈回家。
Last Friday, I wanted to buy a birthday gift for my friend John. But I had to wait for my mom to return home.
赛斯：举例来说，我还没开始工作前就必须买一大堆公司产品。
Seth: for example, I have to buy a lot of the company's products before I even start working.
如果你丢失的话，我的孩子们经常丢书，你必须买一本新的还给图书馆。
And if you don't, you'll pay the penalty and if you lose it, which my children do sometimes, you have to replace it and buy them a new book or video.
史蒂文：我要去给我的父母买一台新的空调。哦，已经两点了，我必须走了。
Steven: I am going to buy a new air conditioner for my parents. Oh, it's two o 'clock. I must go now.
我必须遵守的清单促销代码和优惠券，可以让你在购买一些折扣域。
I have complied a list of Promo codes and coupons which can get you some discount when purchasing domains.
我得先走了，要去买一只小猫咪。这事儿必须跟你们说一下，我有点担心谢尔顿。
Now, if you'll excuse me, I'm off to buy a pussycat. I gotta tell you guys, I'm a little worried about Sheldon.
我买了一些使用的书，但是必须买一套书，实际上2本书，法律计算机办公室的。
I bought some used books but had to buy one set of books, in fact 2 books, for the legal computer office.
我买了一些使用的书，但是必须买一套书，实际上2本书，法律计算机办公室的。
I bought some used books but had to buy one set of books, in fact 2 books, for the legal computer office.
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