常見(jiàn)例句用作名詞 (n.)They had recently installed their lightpen system in a supermarket for stocktaking purpose.他們最近在超級(jí)市場(chǎng)安裝了用于盤(pán)點(diǎn)庫(kù)存的光筆系統(tǒng)。 返回 lightpen