在南非的热带荒漠里,生长着一种奇怪的树,无叶无花,只有树干和树枝。那些光秃秃的枝丫,犹如一根根棍棒插在树干上。因此,这些树就有了个戏称:光棍树。其实,光棍树曾经是长有漂亮的叶子的,即使现在,如果把光棍树种植到温润潮湿的地方,它们也能长出叶子。但是,荒漠里气候炎热,干旱缺雨,蒸发量非常 In the tropical deserts of South Africa, a weird tree grows, with no leaves and flowers, only the trunk and branches. Those bare branches, like a stick inserted in the trunk. Therefore, these trees have a play called: bachelor tree. Actually, balsam trees used to be beautiful and long leaves. Even now, if the bachelor trees are planted in moist and humid places, they can grow leaves. However, the climate in the desert is hot, dry and rain-free, and the amount of evaporation is very high