I'd like you to take a moment right now and, before you continue reading this article, decide whether you think selling is simple or complicated?

在你阅读下文之前，我希望你能回答我一个问题，你认为销售是简单还是复杂的呢？

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Various simple or complicated chemical systems have been used as mimic models for natural enzyme.

学者们利用各种各样简单或复杂的化学体系(模拟模型)来模拟天然酶。

youdao

Various simple or complicated chemical systems have been used as mimic models for natural enzyme.

学者们利用各种各样简单或复杂的化学体系(模拟模型)来模拟天然酶。

youdao