However, there exists an amount of space on the study of soil surface variation.
而在土壤表层水盐变化规律这方面，仍存在研究空间。
The surface temperature of vegetation cover and bare land have biggish variation.
裸地和植被浅层温度变化平缓。
The variation of slope angle has a significant impact on failure surface.
锚板埋深比越大，斜坡倾角的影响也越显著。
The variation of slope angle has a significant impact on failure surface.
锚板埋深比越大，斜坡倾角的影响也越显著。
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