按了几个键后,丽贝卡连接上了她在自由航空公司的电脑。
With a few keystrokes, Rebecca was connected to her computer at Liberty Air Service.
我看到萨拉可以用一只手一次弹几个键的呀。
I saw Sara playing several keys with one hand at the same time.
卡斯·拉泽的妻子丽娜弹了弹家人一直很珍重的钢琴的几个键。
Kasradze's wife Lena tries a few keys on the once-prized piano.
How many pi bonds would you expe PROFESSOR: Two, great.
你们预计它有几个π键,两个,很好。
So how many bonding electrons do we have left?
我们剩下了几个成键电子?
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