統(tǒng)阻力特性 genetic system characteristics: 遺傳系統(tǒng)之特征human system characteristics: 人的系統(tǒng)特性operating system characteristics: 操作系統(tǒng)特性system head: 系統(tǒng)壓頭dummy head system: 仿真頭制式下載手機詞典可隨時隨地查詞查翻譯