截至2019年底，我国有57处湿地自然保护区被列入公约重点保护湿地，其总面积达近700万公顷。

By the end of 2019, our country had 57 wetland nature reserves listed as major wetlands for protection under the convention, covering a total of nearly 7 million hectares.

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孔明听罢，哑然而笑曰：“鹏飞万里，其志岂群鸟能识哉？

Kongming broke into laughter. “The great roc ranges thousands of miles, ” he said.

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So, SIPC was set up in 1970 and SIPC insures cash accounts up to $100,000 and securities accounts up to $500,000.

证券投资者保护公司于1970年成立,其对现金账户的保护金额高达10万美元,对证券账户的保护金额高达50万

耶鲁公开课 - 金融市场课程节选

We want to do that in the simplest context, then we can make the example more and more complicated, but the phenomenon will be the same.

我们想举一个最简单的情景,随后我们可以再看一下更复杂的情况,但是万变不离其宗

耶鲁公开课 - 基础物理课程节选