老脑筋就像老马;如果你想保持它们的工作状态,就必须锻炼它们。
你必须对自己的能力有信心,然后足够坚强地坚持下去。
We usually see only the things we are looking for- so much so that we sometimes see them where they are not.
Innovation in forestry isn't optional—it's essential for survival.《The Green Frontier》