arrowsn.箭；箭头名词arrow的复数形式.arrown.箭；箭头arrowhead formation箭〔楔〕形队形,飞机箭〔楔〕形队形Arrow-Poison frog箭毒蛙arrow-point tracer针尖描记器Arrow-Debreu Model阿罗-德布鲁模型Arrow - Lind theory风险均摊定理arrow-necked bottle细颈瓶arrow-point tracing箭头描记法arrow root vermicelli木薯粉条arrow's impossibility箭头侧arrowheaded characters楔形文字