船尾防浪损的拱形架turtle: n. 〔古语〕 = turtledove. back: n. 1.背,背部;背脊;背面,反面;背后,后部,后面, ...like a turtle on its back: 对事情束手无策turtle (or whale) back deck: 鲸背甲板turtle back arch: 圆穹顶下载手机词典可随时随地查词查翻译