A system of sensors and mirrors would signal the tiniest sinking-in theory.

理论上说，最轻微的地表下沉都可以被传感器和反射镜组成的系统感测出来。

youdao

During some periods, the bottom layer of the world's oceans comes from cold, dense water sinking in the far North Atlantic.

在某些时期，世界海洋的底层来自遥远的北大西洋下沉的寒冷、稠密的水。

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The sun was sinking in the west.

太阳西坠。

《牛津词典》

One provides an unsettling soundtrack to the dreadful hour and a half between the sinking, at two-twenty in the morning, and the appearance of a rescue ship.

NEWYORKER: Unsinkable

Some of that precious land--quite a lot of it, in fact--is sinking under its own weight.

FORBES: Magazine Article

Reality is sinking in for online daters--and the companies that cater to them.

FORBES: Magazine Article