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單字 ballast
音標與例句
    音標 [ ˈbæləst ]
    The ballast, if necessary, shall be installed in the forward cargo-compartment at position 11.
    若有需要放置壓艙物的話，應安裝在前貨艙的位置11。
    The ballast units are part of the lamp units and are attached to the ceiling panels.
字義 n.[U]壓艙物，穩壓器、鎮流器
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