A new plant will spring up wherever a seed falls on a suitable soil surface, but because they do not build big bodies, they cannot compete with other plants for space, water, or sunlight.
当种子落在合适的土壤表面时，一株新的植物就会在那里生长，但由于它们体型不大，它们无法与其他植物竞争空间、水分或阳光。
Inspect wooden tie posts regularly for damage and rotting below the soil surface.
经常地检查在土壤表面下的木质柱子有无损坏和腐烂。
As the water evaporates, a crust of salt is left on the surface of the soil.
水蒸发后，土壤表面留下一层盐。
LCROSS will then study the soil thrown up to ten kilometers above the lunar surface before it too crashes into the moon.
VOA: special.2009.09.30
The crash caused soil to be expelled many kilometers above the lunar surface.
VOA: special.2009.12.30
Drop the seeds over the surface and cover them lightly with soil.
VOA: special.2009.04.28
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