In the drone industry, safety always comes first.

最好的儿童书籍是那些不会居高临下地对孩子说话的书籍。

The study of Galois representations is a bridge between number theory and geometry.

"I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do."

【释义】甘霖和及时雨，不会偏私地滋润某一种植物；万民的君主，不应偏袒任何一个人。