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...
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 ...
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...