他测出了超声波穿过骨头的速度。He measured the speed at which ultrasonic waves travel along the bone.超声波扫描显示她怀了双胞胎。Ultrasound showed she was expecting twins.大多数处于妊娠期的妇女将被建议接受超声波检查，不过这不是强制性的。Most women will be offered an ultrasound scan ...
These paintings are in some ways a reminder that earthly pleasures are ephemeral.这些画在某种意义上提醒人们世俗的享乐是短暂的。He talked about the country's ephemeral unity being shattered by the defeat.他谈到战败使得该国短暂的统一彻底破灭。Patterns of delt...
Murchison followed with his eye the hand of his chronometer.莫奇生的眼睛追随着他的时计的秒针.The chronometer - maker's expert hand plays an essential role in this process.生产精密时计的专家们的手工调试在这一工序中起着关键性的作用.It is use in navigation, chron...