bya是什么意思

A goalie in full gear outweighs a puck bya factor of about 600. Even the fastest slap shot has less momentum than aten-year-old skating along at a mile per hour.

一个穿戴全副装备的守门员的重量是冰球的600倍左右，即便是以最快速度击出的冰球的动量也不超过一个10岁小孩儿以每小时1.6千米的速度滑冰时的动量。

The Polarization and Population difference of the three-level atom, driven bya microwave field and interacted by a strong short laser pulse, is studied by me-ans of semiclassical theory in the paper.

本文采用半经典理论方法研究了在短脉冲作用下，被共振微波场驱动的三能级原子极化强度振幅和粒子数差随时间的变化。

The method of2nd-order optimal design of deformation monitoring network is illustrated bya numerical example.

最后通过一个算例说明形变监测网二类优化设计的方法。