单词 覆材 例句 DEFINITIVE EXAMPLES 权威例句〔sheathing〕Nautical An exterior covering on the underwater part of a ship's hull that protects it against marine growths.【航海】 覆材:在船的船壳水下部分的一层外部覆盖物,保护并抵抗海水的侵蚀美国传统〔sheathi...