Where do I catch the A train?

我在哪里搭A车呢?

You just wait right over on the other platform.

你就在那边另一个月台上等。

Go back upstairs, and cross over. Just follow the signs for the A train.

往回走楼梯，再穿过去，就跟着A车的指示牌子走。

From which platform does the train start?

火车从哪个月台开出?