The abyssal plain is a vast expanse of ocean that stretches from bottom of the continental slopes to the trench zones, where deep canyons like the Marianas Trench cut through the ocean floor.是什么意思_The abyssal plain is a vast expanse of ocean that stretches from bottom of the continental slopes to the trench zones, where deep canyons like the Marianas Trench cut through the ocean floor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句