制造伽马射线短脉冲的一种方法，是电子与正电子的碰撞——之后的湮灭，使粒子的质量转化为能量。
One way to create such short bursts of gamma rays is through the collision — and subsequent annihilation, as the mass of those particles converts into energy — of an electron and a positron.
模拟结果表明，横向磁场通过改变电子与中性粒子的碰撞速率，对电子参数产生不同程度的影响。
The results show that the magnetic field affects the electron transport parameters obviously through changing the collision rate between the electrons and neutral particles.
把大量的邻近电子撞开，是很不精确的：有些电子会凌乱地弹开，而浪费能量；同时也会产生许多碰撞而发热。
Shoving large Numbers of electrons around is imprecise-some shoot out in random directions, wasting energy-and it creates lots of collisions, which produce heat.
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