In the 1970s accelerators were capable of ramping up the speed and thus the energy of particles, but could only smash them into a stationarytarget.
在上世纪70年代，加速器能够增强速度，因此也能给粒子增强能量，但仅能使粒子撞击到一个固定目标上。
2
A stationarytarget is easiest to aim at.
静止的目标是最容易瞄准的。
3
In order to detect the low-speed weak target in the stationary sea clutter, the clutter-whitening processing module is proposed to replace the conventional MTI filter and Doppler filter bank.