1. 坚实地：solid fuel gasification 固体燃料气化 | solid ground 坚实地 | solid ore 矿体

2. 固定接地：solid gravel seal 密实的砾石充填层间密封 | solid ground 固定接地 | solid heat carrier retort 固体热载体干馏炉

3. 直接接地：实心导体 solid conductor | 直接接地 solid ground | 整体逻辑技术 solid logic technology

noun

1. the solid part of the earth's surface

    e.g. the plane turned away from the sea and moved back over land
           the earth shook for several minutes
           he dropped the logs on the ground

    Synonym: landdry landearthgroundterra firma