happen upon造句

1、But if scientists happen upon pure fusion, who knows what they might do with it?
但是如果科学家开启上面的纯核聚变反应堆，谁知道他们可能会用它来做什么？

2、Our heroes happen upon a Bug pokemon Catching Contest.
我们的英雄时发生错误神奇宝贝赶超竞赛。

3、happen upon sb. in the street
在街上偶遇某人

4、How do you happen upon these subjects?
您是如何想到这些主题的？

5、Luck doesn't just happen upon us.
运气并不会碰巧降临在我们身上。

6、Luck doesn't just happen upon us-it comes to us when we're open.
运气并不仅仅发生在：当我们打开它涉及到我们。