常見例句雙語例句The Upper Permian System Longtan coal measure in the Changguang coal deposit is a complete sedimentary cycle, consisting of a regressive and a transgressive series.長廣煤田上二疊統(tǒng)龍?zhí)逗簬r系是由海退系列和海進系列組成的一個完整沉積鏇廻。 返回 transgressive series