basic基本的;
essential 基本的;必要的;
cardinal 主要的，基本的;
fundamental 基本的;
radical 根本的;彻底的;
significant 重大的;有意义的;
primary 主要的;基本的;
key 关键的;
crucial 重要的;决定性的;
momentous 重要的;
vital 至关重要的
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My View on Private Car 论私家车
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这些食物会让你不舒服
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