a toddler's first few halting steps学步幼儿的蹒跚脚步Who can fold up a pushchair, toddler and shopping and then get them all onto the bus?...谁有那本事一手收起婴儿推车，一手抱着刚会走路的孩子，还得提着刚买的东西，然后挤上公共汽车？The toddler pointed to the toy he want...
A large portion of the cytoskeleton consists of threadlike microfilaments composed mainly of the contractile actin.细胞骨架大部分由微丝组成,微丝主要由可收缩的肌动蛋白组成.The eukaryotic cytoskeleton is composed of three basic types of filaments an...
人们可推测此标度具有十分重要的意义.One might suspect that this scale has fundamental significance.最常用的系统为分贝标度系统.The most usual system is that of the decibel scale.在这一调查中并未将标度直接提给回答者.In the survey the scale was not presented directly to t...