Asteroids, also known as " minor planets ", are numerous in the outer space.小行星, 亦称为 “ 小型行星 ”, 在外太空中不计其数.Most stars probably have their quota of planets, meteorids, comets, and asteroids.多数恒星也许还拥有若干行星 、 流星 、 彗星和小行星.The o...
One of the problem areas is lax security for airport personnel.问题之一是对机场员工的安检措施马虎松懈。There have been allegations from survivors that safety standards had been lax.生还者一直指责安全标准执行不严。a lax attitude to health and safety regulat...
He measured the speed at which ultrasonic waves travel along the bone.他测出了超声波穿过骨头的速度。Set up ultrasonic wire bonding laboratory.成立超声波电子焊接实验室。Modern medical technology like type-B ultrasonic checks can reveal the fetus gen...