chains that are fitted over the tyres of a vehicle in order to make it easier and safer to drive in snow

In adverse weather, carry snow chains and be familiar with how to put them on your tyres. 在恶劣的天气下，要随车带着雪地链，并熟悉如何给轮胎上链。

For a front-wheel-drive vehicle, the chains should go on the front two tyres, and for rear-wheel-drive vehicles, on the rear two. 对于前轮驱动车辆，雪链应安装在前面两个轮胎上，对于后轮驱动车辆，应安装在后面两个轮胎上。