形容词
中文翻译：必不可少的
同义词：
['essential', "indispensable例句：1. Indispensable resources are essential for sustainable development.（不可替代的资源对可持续发展至关重要。）2. The team's leader is indispensable to the project's success.（团队的领导者对项目的成功至关重要。）3. The invention of electricity was an indispensable step towards modern life.（电的发明是迈向现代生活的重要一步。）"]
例句：
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1. Indispensable resources are essential for sustainable development.
不可替代的资源对可持续发展至关重要。
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2. The team's leader is indispensable to the project's success.
团队的领导者对项目的成功至关重要。
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3. The invention of electricity was an indispensable step towards modern life.
电的发明是迈向现代生活的重要一步。