1.go down 下降；平静下来；传下去

I had to go down on the floor to clean the room.
为打扫房间我只好跪在地板上。

This medicine goes down smoothly.
这种药物很容易咽下去。

2.come to v. 想起；共计

As he came to a bridge, he heard a truck approaching.
在他来到一座桥头时，他听见一辆卡车驶来。

In a few minutes he suddenly came to.
过了一会儿他突然苏醒过来。