time·serv·er /-ˌsɝvɚ/
趨炎附勢者,隨波逐流者
Time·serv·er n. One who adapts his opinions and manners to the times; one who obsequiously compiles with the ruling power; -- now used only in a bad sense.
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timeserver
n : one who conforms to current ways and opinions for personal
advantage