essential + Extremely important and necessary ☊ 6 New HSK word(s): 5 必需 → + to need/ to require/ essential/ indispensable 5 必要 → + necessary/ essential/ indispensable/ required 6 内涵 → + meaning/ content/ essential properties implied or reflected by a notion/ intention/ connotation/ self-possessed 6 要点 → + main point/ essential 6 要素 → + essential factor/ key constituent 6 主流 → + main stream (of a river)/ fig. the essential point/ main viewpoint of a matter
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