My tireless little cilia make about ten sweeping strokes a second.我那不怕疲劳的小纤毛每秒钟约做10次清扫动作.Healthy, skin, mucous membranes, and cilia are natural barriers to many viruses.健康的皮肤, 粘膜和纤毛是许多病毒的天然屏障.Epithelium can also bear cil...
He looked across at Jackson, doodling on his notebook.他一边朝杰克逊看过去，一边在自己的笔记本上乱涂乱画。Finally, unable to concentrate any longer, she fell to doodling on the writing pad.末后, 她不再去苦思索了, 机械地在那张信笺上画了无数的小圆圈.Such a group of city are ...