The Earth's crust is thought to be divided into huge, movable segments, called plates, which float on a soft plastic layer of rock.
人们认为地壳分成了巨大的、可移动的部分,称为板块,这些板块漂浮在柔软可塑的岩石层上。
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We must not besofton enemies.
我们对敌人绝不能手软。
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"Shanghai's foundations are built onsoft soil, so building multistoried spaces underground would be like digging holes in a piece of bean curd," the government report said.