我们生产的每一块塑料都应该有明确的再利用或回收路径。
粮食安全的未来就在波涛之下,我们必须负责任地养殖。
A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.
"The world is a book, and those who do not travel read only one page."