反义词是standing up

We waited, standing up, for an hour.

我们站着等了一个小时。

Sitting down after a walk is relaxing.

散步后坐下来是很放松的。

You must stand up for your rights.

你必须维护自己的权利。

Sit down and get a drink from the fridge. Dinner will be ready in three minutes.

坐下来喝杯冷饮吧,晚饭再三分钟就好了。