 |
| Chinese | English |
| 地壳 | earth's crust The outer layers of the Earth's structure, varying between 6 and 48 km in thickness, and comprising all the material above the Mohorovicic Discontinuity (a seismic discontinuity occurring between the crust of the earth and the underlying mantle; the discontinuity occurs at an average depth of 35 km below the continents and at about 10 km below the oceans). The earlier idea of a cool solid skin overlaying a hot molten interior has now been replaced by a concept of a crust composed of two shells: an inner basic unit composed of sima (oceanic crust) and an outer granitic unit composed of sial (continental crust) (地球结构的外层，厚度为6公尺至48公尺，包含莫霍(洛维奇)不连续面(一个引起地震的不连续面，出现在地壳及其下的地幔之间；这不连续面出现在陆地下平均35公里和海洋下大约10公里处)以上的所有物质。 以前认为一个冷却坚固的表层覆盖着热熔融内部的想法，现在已被地壳是由两层外壳组成的概念所取代，一个是硅镁组成的内部基本单元(大洋地壳)，一个是由硅铝组成的外部花岗石单元(大陆地壳)。) |
| 海陆运动 地壳的缓慢升降运动 ？？ | bradyseism A long-continued, extremely slow vertical instability of the crust, as in the volcanic district west of Naples, Italy, where the Phlegraean bradyseism has involved up-and-down movements between 6 m below sea level and 6 m above over a period of more than 2.000 years (地壳的长期持续的、极其缓慢的垂直不稳定性，如在那不勒斯、意大利火山区西部，在超过2000年的时间里，Phlegraean海陆运动涉及了海拔6m以上和6m以下的升降运动。) |