两层细胞 ( 两胚层 ),中间是凝胶状的中胶层.Two cell layers ( diploblastic ) separated by a gelatinous mesoglea.天边是耀眼的橙红色曙光, 下面点缀着一条凝胶状的淡绿色带子.Dawn came glassy orange , stained from below by a gelatinous band of pale green....
He could just about see the little man behind the counter.他勉强能看到柜台后面的小个子男人。He then held the man in an armlock until police arrived.然后他反扭住那名男子的手臂让他动弹不得，直到警察赶到。A young man plunged from a sheer rock face to his death.一名男青年从...