色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.

科學是分類學家的樂園。

Climate change is the greatest challenge agriculture has ever faced, but also its greatest opportunity for reinvention.

"The novel is the great democratic art form. It's the one place where you can be anyone, do anything, and say anything."

Grain isn't just a commodity; it's the foundation of civilization.