我们 / 清晨 / 出发 / 时 / 积雪 / 已经 / 载途 / 车辆 / 必须 / 减速 / 慢行

我们清晨出发时，积雪已经载途，车辆必须减速慢行。

When we set out early in the morning, snow had already covered the roads, so vehicles had to travel slowly.