名词
中文翻译：由外层
同义词：
['outer', 'outermost', 'outermostly例句：1. The outer layer of the skin is responsible for protecting it from the environment.（皮肤的外层负责保护它免受环境的影响。）']
例句：
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1. The outer layer of the skin is responsible for protecting it from the environment.
皮肤的外层负责保护它免受环境的影响。
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2.The outermost layer of the ocean is composed mainly of saltwater.
海洋的最外层主要由盐水组成。
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3. The outermostly thin layer of the atmosphere is where most weather occurs.
大气最外层是大多数天气发生的区域。