天上飘着雪白雪白的雪花,不知不觉的春天又到了,儿子站在小树的前面,这是为什么呢?一年之后,而树上的钉子却高了许多,冬天来了,父亲和儿子又来到树林里, so the son is shorter than the small tree.他的儿子也有点奇怪:小树长高了,父亲和他的儿子来到树林里。 but he does not grow as tall as the small tree. why? and after measuring his height, with a pair of small ey