Books make great gifts because they have whole worlds inside of them.
可持续林业不仅仅是砍伐树木;它关乎我们星球的未来。
Learning is essentially a matter of stimulus-response connections.
最好的想法往往在你最意想不到的时候出现。
没有科学,水产养殖就会停滞;没有道德,它就会崩溃。