板块运动是地幔运动的表面现象。地幔是位于地壳和金属内核之间的一层厚厚的岩石壳。
Plate movements are the surface expressions of motions in the mantle—the thick shell of rock that lies between Earth's crust and its metallic core.
该雌（女）花棒，它是由一个枝繁叶茂的壳超过此延长丝状风格和柱头（丝绸），这赶花粉包围的内核。
The pistillate (female) flowers are the kernels on the cob , which is enclosed by a leafy husk beyond which extend threadlike styles and stigmas (the silk), which catch the pollen .
本文研究了内核经硫加金增感的内敏核壳乳剂的感光性能和离子性能。
The properties and ionic conductivities of internal sensitive emulsions, the core of which were chemically sensitized with sulfur-plus-gold, were studied.
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