He worked himself up into a frenzy before his graduation exams.

毕业考试前夕他紧张得几乎疯了。

She worked up her typing speed to seventy words a minute.

她把打字速度提高到每70字。

He has a tendency to run around in circles getting more and more worked up.

他总是来地瞎忙活，把得越来越紧张。

The practice is not a very lucrative one at the moment, but if it is worked up it should prove quite profitable.

这种业务眼下还不大能赚钱, 但如果努力经营, 会证明是大可获利的。