Just then, the traitor transferred to another tramcar.

正在那时，卖国到了另一辆车上。

The tramcar became entangled in their ranks, and moved on painfully, like a caterpillar in a swarm of ants.

电车纠缠在他们中， 像蚂蚁群中毛毛虫一样痛苦地前行。