同根派生 track ball相關(guān)詞英漢例句Input devices include keyboards and pointing devices such as mouse,joystick,track ball, or light pen.輸入設(shè)備包括鍵盤和點(diǎn)擊設(shè)備如鼠標(biāo)，操縱桿，跟蹤球或光筆。track ball更多例句