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事前, じぜん
1. prior, beforehand, in advance, before the fact, ex ante
先前的;事先的;预先的;事前的;预先的(用于表示在事情发生之前)
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前もって, 前以て, まえもって
1. in advance, beforehand, previously, ahead of time
提前,事先,先前,预先