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防御器官动物或植物的防护层,结构或器官,如牙齿,爪子,荆棘或乌龟的壳
A protective covering, structure, or organ of an animal or a plant, such as teeth, claws, thorns, or the shell of a turtle.
(用以护堤、坝等的)柴排,沉排,沉床荆棘和杆子的密织席,用于保护堤、坝,使不受侵蚀
A closely woven mat of brush and poles used to protect an embankment, a dike, or a dam from erosion.