这些火焰造成了对流漏斗，把许多微粒抛向上层大气。These fires create convection funnels, and throw a lot of particles into the upper atmosphere.对流可分为两类, 即 自然对流和强制对流.Convection can be of two types: natural convection and forced convection.散发汗水的一种方...
随着水星的靠近,将上演一场行星三重唱.And with Mercury close by this makes for a planetary trio.集体表演称之为二重唱 、 三重唱 、 四重唱以及大合唱等等.Groups are called duets, trios, quartets , choruses , choirs, etc.很快地二重奏形成了三重唱.Soon the duet will become a trio....