accidental
/ˌæksəˈdɛntəl/
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adj. 意外的；偶然的
- Some of the most useful inventions in history, such as the microwave oven, were accidental. 歷史上一些最實用的發明，像是微波爐，其實是意外發現的。
其他意思
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adj. 意外的, 偶然的
An accidental event happens by chance or as the result of an accident, and is not deliberately intended.
- Video evidence was shown to the inquest jury, before it returned a verdict of accidental death
也出現在：
字根
cad, cid, cas 落下、發生
ac + cid + ent + al向、到 + 落下 + 形容詞；人 + 形容詞