transient

詞意辨析：

temporary, momentary, transient

這些形容詞均含“短暫的，瞬息的”之意。
temporary: 普通用詞，其反義是permanent。指持續有限的可計時間，著重暫時的存在、套用或效應。
momentary: 指瞬時即逝的，也表明間很短的。
transient: 指停留或延續的時間很短。

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英文解釋：

名詞 transient:

1. one who stays for only a short time
2. (physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or load

形容詞 transient:

1. of a mental act; causing effects outside the mind
   同義詞：transeunt
2. lasting a very short time
   同義詞：ephemeral, passing, short-lived, transitory, fugacious

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詞型變化：

副詞:transiently 　

相關句子：

1. A transient phenomenon or property, especially a transient electric current.
   瞬變現象一種瞬間變化的現象或性質，尤指瞬變的電流
2. One that is transient, especially a hotel guest or boarder who stays for only a brief time.
   臨時旅客過路人，尤指只呆很短一段時間的旅館住宿者
3. Her feeling of depression was transient.
   她那抑鬱的心情一會兒就過去了。
4. Life is transient.
   人生如朝露。