我想你不会在家，只是碰碰运气顺路来看一下。
I didn't think you'd be at home but I just called by on the off chance.
令哈利·波特迷十分失望的是，使一个人身大小的物体在可见光波段隐身，貌似只是碰碰运气。
Much to the disappointment of Harry Potter fans, cloaking a human-sized object at visible wavelengths seems like a long shot.
奥特每天晚上都去那儿去守着，你知道，他只是想碰碰运气！
Otter goes there every night and watches—on the chance, you know, just on the chance!
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