例句與造句

1. The comets ' offspring , the meteor swarms , travel in regular orbits , similar to the earth ' s orbit around the sun
   彗星的后裔，即流星團(tuán)，沿正常的軌道運(yùn)行，與地球繞太陽(yáng)運(yùn)行的軌道相似。
2. It's difficult to find meteor swarm in a sentence. 用meteor swarm造句挺難的