下层 xiàcéng lower class Origin Definitions Defs Strokes Stroke Words Sentences Sents Showing: underlayer All meanings 2 xiàcéng 2 lower class 1underlayer 1 1 sentence for 下层 (xiàcéng — underlayer) 地壳的下层主要是由坚硬的岩石组成的。 dìqiào de xiàcéng zhǔyào shì yóu jiānyìng de yánshí zǔchéng de. The lower layer of the Earth's crust is primarily composed of hard rock. Source: Dong Chinese Dictionary