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

Leadership in forestry means having the courage to make decisions that will outlast your tenure.

The goal of software engineering is to control complexity, not to create it.

我們要用現代生物技術武裝傳統農業，提高農業生產效率。

The novel is the great modern epic because it can contain everything: poetry, history, philosophy, politics.

對抗壓力的最大武器是我們選擇一種思想而不是另一種思想的能力。