The development of a broadly tunable excimer laser source by exploiting bound-free transitions of electron beam-pumped diatomic and triatomic are gas halides is described.

宽带可调谐准分子激光源，是电子束泵浦的双原子和三原子稀有气体卤化物通过束缚-自由跃迁产生的。

youdao

With one bound Jack was free.

纵身一跃，杰克自由了。

《柯林斯英汉双解大词典》

But it was free and I was bound — there was no way of meeting.

可它是自由的，我是受束缚的- - -我们不可能相会。

youdao

Rhys Evans made a crucial save in the 78th minute when Beagrie's 20-yard free-kick looked bound for his bottom corner.

BBC: L Orient 2-0 Scunthorpe

But the move follows a string of incidents where either security in Passport - or the Hotmail free e-mail system to which it is tightly bound - has proved to be lax.

BBC: New flaw puts Passport offline

We hear stories about these home-bound, over-age young adults spending their days on the couch, rent-free, unemployed, and seemingly un-motivated to do otherwise.

FORBES: No. Hell No! Over My Dead Body!