在上下 meaning in Chinese
in the afternoon
Examples
- In those warm beams the motes kept dancing up and down .
只见温暖的光芒里面，微细的灰尘在上下飞扬。 - When an inhomogeneous plane wave is introduced into a dense dielectric layer, it can bounce between the two boundaries .
把一非均匀平面波引进折射率较高的介质层时，它会在上下界面间来回地“弹”射。 - It seems the exchange rate fluctuates almost daily
外汇兑换率似乎每天都在上下波动。 - Between the upper and nether millstone
在上下两片磨石之间 - " yes . so , wax on . wax off
于是丹尼一整天就在上下。