When two plates meet at a mid-ocean ridge, their motions create a series of seafloor stripes and, if each plate is underlain by a hotspot, a pair of island chains.是什么意思_When two plates meet at a mid-ocean ridge, their motions create a series of seafloor stripes and, if each plate is underlain by a hotspot, a pair of island chains.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句