名词
中文翻译：初级板
同义词：
['primary layer', "primary sector例句：1. The primary plate is the first layer of the Earth's crust.（初级板块是地球地壳的第一层。）"]
例句：
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1. The primary plate is the first layer of the Earth's crust.
初级板块是地球地壳的第一层。
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2.The primary plate is responsible for the formation of the continental crust.
初级板块负责形成大陆地壳。
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3. The primary plate is where most of the Earth's crust is formed.
初级板块是大多数地球地壳形成的地点。