◎〔～瑚〕由一种叫珊瑚虫的腔肠动物的外骨骼聚集而成.Hu 〕 by a call of the coelenterate coral exoskeleton made together.主要为水生的节肢动物,通常身体分节并有壳质的外骨骼.The outermost layer of cuticle of an arthropod exoskeleton, composed mostly of wax.一种坚硬的半透明角质物质, 节肢动物...
She is as timorous as a rabbit .她胆小得像只兔子。He was the most timorous person in that event.在那次事件中他是个胆小鬼.He is a reclusive, timorous creature.他是个离群索居、胆小羞怯的家伙。Some delegates believe the final declaration is likely to be too ti...