第十一节有一对分节的附肢, 即尾须.The 11 th segment carries a pair of segmented appendages, the cerci.头 、 胸和尾具有横向的分节.The head, the thorax and the tail comprise the trumsverse segmentation.浅谈环节动物身体的分节现象及其优点.Discuss the metamerism of anne...
She was nervous and kept scanning the crowd for Paul.她很紧张,眼睛不停地在人群中搜寻保罗。She sat scanning the yellowing pages.她坐着浏览发黄的书页。A new technological marvel was invented at Cambridge University in England, the scanning electron mi...