Other times they copy their chromosomes but hold off parceling them out to their army of offspring until the time is right.
有的时候，它们会先复制下染色体，但是会等到特定的时间再集中生成后代。
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.
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。
We can hold off on watering our lawns in times of drought.
我们可以等到干旱的时候再浇灌草地。
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