莫妮卡拿起她的伯罗圆珠笔，放在牙齿间转动着。Monica picked up her Biro and revolved it between her teeth.他吧嗒一声把笔帽扣在了圆珠笔上。He snapped the cap on his ballpoint.市场上圆珠笔泛滥.There is an overflow of cheap ballpoint pens in the market....
腔肠动物的刺针对于外界的刺激很敏感.The stings of coelenterates are quite sensitive towards outside stimulation.根据颧弓最高点间距可推算卵圆孔穿刺时穿刺针进针的深度.Depth of puncture can be deduced according to interval of apogee of malar archs.切割套管然后迅速转动穿刺针获取组织样本...
He is course tutor in archaeology at the University of Southampton.他是南安普敦大学考古学课程导师。A distinction must be made between archaeology proper and science-based archaeology.必须区分考古学本身和以科学为基础的考古学。She teaches archaeology at the u...