A beam of light will not bend round comers unless made to do so with the help of a reflecting device.

A除非有反射装置的帮助，使得光线在拐弯处弯曲，否则光线是不会弯曲的。

youdao

A beam of light will not bend round comers unless made to do so with the help of a reflecting device.

A除非有反射装置的帮助，使得光线在拐弯处弯曲，否则光线是不会弯曲的。

youdao