Whether you have 10 minutes or 2 hours at a time, just by following these examples you could find up to 20 hours per month or more!
不论你一次拥有10分钟还是2小时，只要按照这些例子就能在每个月找到20小时或更多的时间。
On Earth, gravity helps a plant's stems and roots to find "up" and "down".
在地球上，重力有助于植物的茎“向上”生长，根“向下”生长。
On Earth, gravity helps a plant's stems and roots to find "up" and "down".
在地球上，重力有助于植物的茎“向上”生长，根“向下”生长。
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