S-22：stretch one's legs 活动
A:Oh, I must have been sitting in the same position too long. My legs have fallen asleep.
A:哦，我可能坐的时间太长了，我的腿都麻了。
B:Shift it a little before you get up.
B:你站起来之前先活动活动。
A:And I need to stretch my legs now.
A:现在我是需要活动活动。
