该研究将菜谱定义为包含四种或四种以上配料的主菜。

The research defined a recipe as a main course dish containing four or more ingredients.

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大规模鲸鱼搁浅的现象涉及到四种或更多种动物。

Mass whale strandings involve four or more animals.

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他们还询问孩子们，对于男孩或女孩是否不该演奏这四种乐器中的某一种，他们怎么看。

They also asked the children for their views on whether boys or girls should not play any of the four instruments.

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While there are only four different bases that make up either RNA or DNA, and so the complexity of an RNA polymer is limited.

在RNA或DNA的构成中,只含四种不同的碱基,因此一个RNA分子的复杂程度是有限的

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