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1·So, naturally, their first calendar was divided up into three seasons, each based on the river's changes: inundation, subsidence and harvest.

因此，他们的第一个日历系统被自然地分为三个季节，每个季节都是根据河流的变化而划分：淹没期、下沉期和丰水期。

2·Afterwards during the season of subsidence, the water would subside, or recede, revealing a new layer of fertile black silt and allowing for the planting of various crops.

在随后的沉降季节，水会退去，并露出一层新的肥沃的黑色淤泥，可以在这上面种植各种作物。

3·Land subsidence has been aggravated by overpumping of underground water and the construction of thousands of high-rise buildings.

过度抽取地下水和建造成千上万的高层建筑加剧了地面沉降。

4·The railway line was closed because of (a) subsidence.

铁路线和那条道路平行。

5·Overexploiting underground water will cause land subsidence.

过分的开采地下水，会造成地面下陷。

6·Many basins were formed by the subsidence of the earth'scrust.

许多盆地都是由于地壳陷落而形成的。

7·Now the barren river bed is pitted with cracks and subsidence holes.

而现在，干涸的河床布满凹坑，处处是裂缝和孔洞。

8·The horizontal stress is high in the uplift and low in the subsidence areas.

隆起区多属高水平应力区，沉降区多属低水平应力区。

9·Surface subsidence (ground depression) caused by the overuse of ground water.

过度抽取地下水引起的地面沉降。

10·One patient developed titanium mess cage subsidence, but revision was not necessary.

一个病人出现混乱钛笼的下沉，但并无必要去修正。

下沉

1·Over geologic time the central volcano becomes extinct, followed by erosion and subsidence beneath the sea surface, leaving the coral reefs as a ring around (or cap on) the submerged island remnant.

由于侵蚀和海底的下沉，经过地质时代的变迁，中心的火山已经不见踪影，而只留下珊瑚礁环绕或覆盖在沉入海底的火山岛上。

2·Thee authors of the study warn that continued subsidence poses a safety threat to the city of more than 2o million, with a strong impact on train operations one of the predictions.

该研究的作者们发出警告，持续不断的下沉正对这座有2千多万人口的城市带来安全威胁，其中的一项预测是“会对火车运行造成严重影响”。

3·One patient developed titanium mess cage subsidence, but revision was not necessary.

一个病人出现混乱钛笼的下沉，但并无必要去修正。

4·Where relevant, the design should include the effects of phenomena such as subsidence, heave, freezing, thawing, erosion, etc.

设计时应考虑相关现象的影响，例如下沉，上升，冰冻，融化，腐蚀等。

5·Experts say it is still too early to know if the canal's water deliveries will help recharge the aquifer and slow Beijing's rate of subsidence.

专家表示，想要知道南水北调能否帮助充盈含水层并减慢北京下沉的速度还为时尚早。

(1)surface subsidence地表下沉；地表塌陷

(1)ground subsidence地层陷落；地层下陷

(1)land subsidence地面沉降；土地下沉；土地沉陷

(1)subsidence area沉降面积；沉陷地区