The internal gears of these contraptions were turned either by the pressure of uncoiling springs or the flow of water, mercury or sand.
这些玩意儿的内部齿轮由开卷弹簧压力或水流，汞或沙转动。
2
Knowledge like springs under the sand, to dig the deeper, spring more clearly.
知识好像砂石下的泉水，掘得越深，泉水越清。
3
Colored deep red by algae adapted to survive in its hypersaline waters, this lake in the Ubari Sand Sea is fed by springs from an underground aquifer created by ancient rains.