字首 Ｄ
單字 dual
音標與例句
    音標 [ ˈduəl ]
    The cabin escape facilities are installed at all aircraft exits, and function as dual-lane or single-lane escape-slides.
    客艙逃生滑梯裝在飛機全部出口，有單滑道與雙滑道兩種。
字義 adj.雙重的
圖說 dual
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