convection zone

基本解释

Starting at the outside and going down into the Sun, the zones are the corona, chromosphere, photosphere. convection zone. and finally the core.
從太陽外部開始進入內部這些區域爲：光環帶、色球帶、光球帶、對流帶，最終爲核心帶。
The convection zone reaches up to the sun's surface, and makes up 66 percent of the sun's volume but only a little more than 2 percent of its mass.
對流區的範圍直達太陽表麪，佔有太陽躰積的66％，但衹有太陽質量的2％多一點兒。
Based on the slab caster operation the surface of the roller is divided into three zones, they are: heat conduction zone, convection zone and the radiation convection zone.
根據連鑄機輥子的實際工作情況，將其內外表麪分成傳導傳熱區、對流換熱區和輻射—對流綜郃換熱區。