Keep your head up, and look around you from time to time.要抬起头，不时看看四周。I'm going to look around and see what I can find.我去四下里转转，看能发现些什么。You'd better look around carefully before making the final decision.在作最后结论之前...
这种泡囊化现象即胞饮作用确实发生于某些动物和高等绿色植物细胞.This vesiculation phenomenon, pinocytosis, certainly occurs in some animal and higher green plants.加水后混合物表面就会形成小小的珠状泡囊.To take the form of or become enclosed in a cyst.泡囊:来源不同、形状各异的小型液泡,其内可...
他关上门,踏上了1/4英里长的下山路.He closed his door and started the quarter-mile walk down the hill.我挤出人群，踏上了自动扶梯。I pushed through the crowds and on to the escalator.我们很不愿意踏上如此漫长艰辛的回家之路。We were reluctant to start the long trudge home....