这个空物体必须和发射器有交叉的点以便于从这些部位发射粒子。

The null must intersect with the emitter at the point where you want to emit particles.

youdao

他指的当然是LHC(大型强子对撞机)。在阿尔卑斯山脚下，LHC成功发射粒子束，进行了第一次试验。

He was, of course, referring to the Large Hadron Collider that just conducted its first successful test, firing a stream of particles under the Alps.

youdao

由于轻核质量轻，发射粒子后反冲效应很强，理论计算中还严格考虑了反冲效应的影响，从而保证了能量守恒。

Because of the light mass, the recoil effect is strong after the particle is emitted, so the recoil effect is must taken into account to maintain the energy balance.

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