The cheaper FNDs fluoresce roughly as well as those produced with an electron beam.此种廉价FND所发的荧光与用电子束生产的FND所发荧光大致相同.The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标.A high quality beam ha...
Ann Bradley dispels the old wives' tales and gives the medical facts.安·布拉德利破除迷信，给出了医学事实。This basic utilitarian model gives a relatively unsophisticated account of human behaviour.这个实用的基础模型较为简略地解释了人类的行为。I respect his...
有一样东西掉到地板上又滚到床沿挂布的下面.Something dropped on the floor and rolled beneath the valance of the bed.戒指滚到床沿挂布的下面.The ring has been rolled beneath the valance of the bed.他弯下身撩起床沿的挂布.He stooped and lifted the valance....