形容词
中文翻译：必需的
同义词：
['indispensable', 'fundamental', 'quintessential例句：1. The essential ingredientin this recipe is salt.（这个食谱的必备成分是盐。）2. The essential difference betweenthe two cultures is their approach to life.（两种文化之间最根本的区别是他们对生活的态度。）']
例句：
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1. The essential ingredientin this recipe is salt.
这个食谱的必备成分是盐。
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2. The essential difference betweenthe two cultures is their approach to life.
两种文化之间最根本的区别是他们对生活的态度。
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3. The essential task for the new managerwas to improve efficiency.
新任经理的首要任务是提高效率。