1. find unexpectedly;

   "the archeologists chanced upon an old tomb"
   "she struck a goldmine"
   "The hikers finally struck the main path to the lake"
   

2. take possession of;

   "She entered upon the estate of her rich relatives"
   

1.偶然碰到(或发现)
If youcome upon someone or something, you meet them or find them by chance.

e.g. I cameupon an irresistible item at a yard sale.
在一次庭院拍卖会上，我偶然发现了一个忍不住想买的东西。

2.产生(某种态度或感觉)
If an attitude or feelingcomes upon you, it begins to affect you.

e.g. A sense of impending doom cameupon all of us.
我们所有人都有一种大难临头的感觉。

1.

1. 遇到：come under heavy criticism遭到严厉的批评 |comeupon 遇到 | communicative competence交际能力

2.

2. 突然袭击：come up with产生;找到 |comeupon 突然袭击 |comedyn.喜剧;一出喜剧,喜剧性事件

3. 突然产生：comeupon 突临 |comeupon 突然产生 |come what may 不论怎样

4. come upon什么意思

4. 突临：comeupon the stage 进入社会 |comeupon 突临 |comeupon 突然产生