无人机的安全性不是选项,而是底线。
The computer is an interactive medium, the first medium that allows for the representation of processes that can be manipulated by the user.
烘焙的成功是科学、艺术和激情的结合。
我们面临这样一个进退两难的境地,即教育已经成为智慧和自由思想最主要的障 碍之一。
A classic is a book that has never finished saying what it has to say.