常見例句雙語例句The sphingomyelin pathway is a ubiquitous signaling system, in which ceramide acts as a second messenger.鞘磷脂途徑是一普遍存在的信號系統(tǒng)。www.lifescience.net.cnIn one of the first images transmitted back to Earth following MESSENGER's second flyby of Mercury on October 6, 2008, a spectacular and extensive system of rays can be seen.08年10月6號，“信使號”二次飛越水星后傳回地球的首批照片發(fā)現(xiàn)了廣闊壯觀的輻射紋。 返回 second messenger system