upon

prep.

在…上面；当…时候；

1. All our hopes rested upon this venture.
   我们所有的希望都寄托在这次冒险上了。
2. The water splashed out of the tub upon the floor.
   水从缸里飞溅出来，落在地板上。
3. Upon his release, Davis went immediately to his mother.
   戴维斯一被释放就立即回到了母亲身边。
4. Christmas is almost upon us again.
   圣诞节又快到了。

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