I stumbled sideways before landing flat on my back, much to the amusement of the rest of the guys.
我向侧面绊了一下，然后仰面摔倒了，这让其余人乐不可支。
I stumbled across his advert accidentally after finishing university, and have not looked back since.
在大学毕业后的一次偶然的机会，我意外看到了他的广告，从此就没有再回头。
That night I didn't sleep well. My room-mates stumbled back alone one after the other at gaps of about an hour and collapsed noisily into their beds.
当夜我没有睡好，同房客人差不多隔一小时回来一个，很大声地倒在床上。
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