对于正在备考托福的考生来说，词汇是特别重要的，不管是听力、写作、阅读还是口语，都关系着词汇。

You don’t learn to walk by following rules. You learn by doing, and by falling over.

你不是靠规则来学走路，你是靠去做和跌倒来学习。

sediment  noun

[ˈsedɪmənt]

matter that has been deposited by some natural process

沉淀物；沉积物

例句：

There is some sediment in the ink.

墨水沉淀了。