多米尼加共和国流传着这样一句话:“要想知道天下不下雨,先看雨蕉哭不哭”。这种“雨蕉”是一种树,当地每家每户都要在自家门前种上几棵,每逢外出前看它一眼,根据它是否在“哭泣”来判断天气情况,做好相应的防雨准备。雨蕉树的“哭泣”是一种自然现象。它的叶片和茎干的表皮组织十分细密,全身好像披上了一层防雨布。下雨前,空气的湿度很大, The Dominican Republic circulated such a sentence: “To want to know the world is not raining, look at the rain do not cry crying”. This kind of “banana” is a kind of tree. Every household in the local area should plant a few trees in front of their own house and look at it before going out, and judge the weather condition according to whether it is crying or not , Make the appropriate rain preparation. Rain banana tree “crying ” is a natural phenomenon. Its leaves and stems of epidermal tissue is very fine, the whole body as if covered with a layer of rain cloth. Before it rains, the humidity of the air is very big,