你可以先拉伸一条腿,然后换另外一条腿,或者将手从一边移动到另外一边。
You can vary this exercise by stretching first one leg, then the other, or by moving your hand positions from side to side.
如果你的牙刷的刷毛不直了,而是明显的偏向一边了,是时候换根新的了。
If the bristles on your toothbrush no longer stick up straight but rather flare to the side, it's time for a new one.
坐直。伸直左腿;将左脚离地。让脚趾朝上、下方向。重复3-5次。换另一边重复。
Sit upright. Hold left foot off the floor with left leg straight. Point toes up and downward. Repeat 3 - 5 times. Repeat with other side.
In other words, you know we've got the two gases on either side of that partition.
换句话说,你知道,我们在这个隔板的每一边各有一种气体。
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