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。