她经常旅行，穿梭于她在世界各地的多处住所。She travels con-stantly, moving among her several residences around the world.他们能住得起的最好的住所也非常拥挤、肮脏不堪。The best housing they could afford was crowded and filthy.我走街串巷找到了他的新住所。I went round the streets a...
These fires create convection funnels, and throw a lot of particles into the upper atmosphere.这些火焰造成了对流漏斗，把许多微粒抛向上层大气。Convection can be of two types: natural convection and forced convection.对流可分为两类, 即 自然对流和强制对流.Conducti...