My tireless little cilia make about ten sweeping strokes a second.我那不怕疲勞的小纖毛每秒鐘約做10次清掃動作.Healthy, skin, mucous membranes, and cilia are natural barriers to many viruses.健康的皮膚, 粘膜和纖毛是許多病毒的天然屏障.Epithelium can also bear cil...
...a walk along the ramparts of the Old City.沿著老城的城墻漫步A number of staircases ascend from the cobbled streets onto the ramparts.一段石階從鵝卵石路上一直向上直通城墻。Blocks of flats have been holed and some shells have fallen within the his...