When we want to have more roses we must plant trees.
这是英国小说家艾略特（G.Eliot）的一句名言,原话是：
It never will rain roses.When we want to have more roses we must plant trees.
天上不会自己掉玫瑰,如果我们想要更多玫瑰花,就必须种下更多玫瑰树.