In order to absorb water, the speed of root elongation in plants must surpass the speed of the humid soil layer moving down.

为了能够有效地从沙层中获得水分，植物的根系的伸长的速度必须大于湿沙层下降的速度。

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But because the cemetery thin soil layer, which really humid, so he did not really care.

但是因为这个墓地土层薄，里面湿气很重，所以他也没很在意。

youdao

But because the cemetery thin soil layer, which really humid, so he did not really care.

但是因为这个墓地土层薄，里面湿气很重，所以他也没很在意。

youdao