他加快速度去赶公交车。

He increased his speed to catch the bus.

你需要加快速度，不要滞后。

You need to speed up and not lag behind.

我必须加快速度才能赶上他。

I need to speed up to catch up with him.

我们需要加快速度才能赶上他们。

We need to speed up to catch up with them.

我们需要加快速度赶路，否则会迟到。

We need to speed up and hurry on with our journey, or we will be late.

我们必须加快速度，因为时间就是金钱。

We must speed up because time is money.

我们需要加快速度才能追上前面的队伍。

We need to speed up to catch up with the group ahead.

我们需要两个两个地数这些物品以加快速度。

We need to count the items in twos to make it faster.

在平坦笔直的道路上，你可以加快速度。

On a clear, straight road you can gather/pick up speed.

公共汽车已在加快速度。

The bus was already quickening its pace.