A person has a budget constraint if the person can borrow and lend at the interest rate.

在某一利率下,人都有自己的预算限制

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because it's just so fascinating to not limit myself to one field

因为不把自己限制在一个领域太迷人了，

选择美术的原因 - SpeakingMax英语口语达人

Restriction enzymes have names, The names all look - they're all italicized and they're capital letters and small letters so that they won't be easy for you to understand, but they are - if you know the nomenclature, easy to understand.

限制性内切酶有自己的名字,名字看起来都很--,都是斜体的,大写小写字母混合,你们不太容易理解,但它们都是--如果你懂命名法,是很容易理解的

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