树沉默不语，毫不起眼。可有谁知道这些无言的树却支撑着我们这个星球，庇护着天下的生灵呢？重返母校时，我碰到一位“老朋友”，十几年后的今天我们皆长大了，但，我那“联伴”现在已有30英尺高了。我们首次相遇于植树节。那时学校集体种树，在操场上种上一种蓝云杉，它们也 Tree silent, insignificant. Can anyone know that these silent trees support our planet, sheltering the world’s life? When I returned to my alma mater, I met an “old friend” and we were all grown up more than a dozen years later, but my “associate” is now 30 feet high. We met for the first time at Arbor Day. At that time, schools planted trees collectively and planted a kind of blue spruce on the playground, too