四、何謂複式鍋爐？試繪簡圖並說明其構造。（20 分）

五、請將下列專業英文翻譯成中文。（10 分） A condenser is a vessel in which vapor is deprived of its latent heat of vaporization and so is changed to its liquid state, usually by cooling at constant pressure. In surface condensers, steam enters at an upper level, passes over tubes in which cold sea water circulates, falls as water to the bottom and is removed by a pump (or flows to a feed tank).