除地球以外，火星也是一个存在表层水的行星。
Mars is also a planet that has water on its surface besides the earth.
而在土壤表层水盐变化规律这方面，仍存在研究空间。
However, there exists an amount of space on the study of soil surface variation.
安装不好的遮雨板会发生开逢，水将通过缝隙渗漏到屋面的表层。
Poorly applied flashings open and allow water to penetrate the roof surface.
安装不好的遮雨板会发生开逢，水将通过缝隙渗漏到屋面的表层。
Poorly applied flashings open and allow water to penetrate the roof surface.
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