1·It was unknown if the coral base of the island, about 12 square miles, might be subsiding.
至于岛上的约12平方公里珊瑚礁岛是否会下沉，目前还不知道。
2·Houses in several Arctic towns are already badly subsiding.
有几个北极城镇的房子已经严重下沉。
3·Mexico City is sinking by up to 28cm a year and Jakarta is subsiding at a similar rate.
墨西哥城每年下沉多达28厘米，雅加达下沉速度类似。
4·First, based on similar material model test, top coal cave-in characters in steep and thick seam were studied as well as failure law of main roof and features of surface subsiding.
首先利用相似模拟实验研究了急斜特厚煤层顶煤的冒落特征、顶板的破坏规律，以及地表下沉的特点。