necessitate

Compared meaning: make something necessary (verb).

比较义项：需要，使某事成为必需（动词）。

• need

  Common, everyday word; the subject can be a person, animal or thing, and it is followed by a noun or a to-infinitive; used in both speech and writing.

  常用词，主语可以是人、动物或事物，后接名词或不定式（to do），口语和书面语中都很常见。

  We need more chairs for the guests tonight.

  今晚我们需要更多的椅子来招待客人。

• necessitate 本词

  Formal word, mainly written; the subject is normally an event, situation or fact, not a person, and it is followed by a noun or gerund rather than a to-infinitive.

  正式用词，多用于书面语；主语通常是事件、情况或事实，而不是人，后面接名词或动名词，而不是不定式。

  A sudden storm will necessitate closing the beach today.

  突如其来的暴风雨将使今天不得不关闭海滩。

Need and necessitate both mean something is necessary. Need is common and everyday; its subject can be a person, animal, or thing. Necessitate is formal and written; its subject is usually an event, not a person, and it takes a noun, not an infinitive.

两者都表示“某事是必需的”，但 need 是最常用的说法，主语可以是人、动物或事物；necessitate 是正式用词，多见于书面语，主语通常是造成结果的事件或情况而不是人，且后面常接名词或动名词，而不是不定式。此处不比较 need 作名词（“需要，需求”）的用法。