Hasty [adj:hastier,hastiest]

1.said, made or done very quickly, especially when this has bad results

2.hasty in doing sth: acting or deciding too quickly,withour enough thought

Hurried [adj:more hurried,most hurried. Usually before noun]

1. done too quickly because you do not have enough time.

Quick [adj:quick,quickest]

1. done with speed;taking or lasting a short time

2. quick to do sth :moving or doing sth fast

3. [only before noun]happening very soon or without delay

Sudden[adj]

1.happening or done quickly and unexpectedly

这四个词都有发生或行动迅速的意思。

Hasty :通常用于没有多想的“匆忙”，往往伴随有糟糕的结果。

Hurried：因为时间不够用，所以匆忙。

Quick ：不带有感情色彩的，快。

Sudden ：突出令人“意想不到”的快。

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