接受培训的英文：
undergo training

The volunteers are in training.
志愿人员在接受培训。

To undergo or cause to undergo necrosis.
坏死引起坏的和使发生坏死

To subject to or undergo hydrolysis.
使分解受水解作用的影响或进行水解作用

The system undergoes no acceleration.
该体系不承受加速度作用。

To undergo,produce,or show fluorescence.
发荧光经受、发出或显露荧光

The planes have to undergo rigorous safety checks.
飞机必须经过严密的安全检查。

the tail of a train
火车的尾部

explosive train
火药系

Is this dog trained?
这狗受过排便训练吗？

The train was in motion.
火车开动了。

This is a passenger train.
这是辆客运列车。