prevenient

1·Analogy bear hardships prevenient, enjoy after.

比喻吃苦在先，享受在后。

2·And airborne contrary, buyer is pick up goods commonly prevenient, pay after.

而空运则相反，买方一般都是提货在先，付款在后。

3·Buy those who have tenant is secondhand the room should have "character" prevenient.

购买有承租人的二手房要有“言”在先。