Innovation in forestry isn't about replacing nature with technology, but using technology to better understand and work with nature.
在采矿业中，效率和环境保护必须齐头并进。
动力学的方程在用变分法的语言表达时是完全的。
Welcome, O life! I go to encounter for the millionth time the reality of experience and to forge in the smithy of my soul the uncreated conscience of my race.
Life is too short to be anything but happy.
