Some people tend to have their finger in every pie.
有些人事事都爱插一手。
They try to do too many things at a time,
他们想一次同时做很多事。
and they end up achieving nothing.
结果一件事也没做成。
If you're smart, you should do one thing at a time.
你如果聪明的话，就应一次做一件事。
That way, the chances of success are much greater.
那样的话，成功的几率就大多了。
As the saying puts it, "If you run after two hares, you will catch neither. "
有道是：“同时追两兔，两头都落空。”