outer ear外耳outeradj.外部的；外面的outer sphere mechanism外层机理outer root sheath cell外根鞘细胞outer sublittoral zone下浅海地带,底亚滨海带Outer-space Shooting太空射击outer technical forces外部技术力量outer ovariolar sheath卵巢外膜outer urethral orifice尿孔Outer Procurement Navy海军外部采购项目outer submarginal seta亚缘外毛outer turning bus door外摆式车门