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for a moment; for a minute
for a while; for some time
for the time being; for now
it's been a long time; long time no see
しばらく待ってもバスが来なかった。
I waited for a while but the bus didn't come.
暫くの間、旅行に出かけます。
I'm going on a trip for a while.
しばらくお会いしていませんね。
It's been a while since we last met.