beam reversal的用法和樣例：
例句
- The reversal of any entropychanging transformation would be neither reasonable nor possible.
熵的任何反向變化都是不合理的也是不可能的。 - The scarfed nozzle is used in engines which can produce reversal thrust, or to produce revolving torque on turbine rocket engines at high speed.
摘要斜切噴管常用于產生反向推力，或產生旋轉力矩使火箭高速旋轉的渦輪式火箭發動機中。
