一、柴油主機的功率/轉速特性圖為引擎安全運轉之重要指標，特性圖中需繪出數條重要曲線以了解主機安全運轉範圍。試繪出功率/轉速特性圖，標示出特性圖中各曲線名稱並敘述其所代表意義。（25 分）

四、請將下列英文翻譯成中文：（15 分） The piston reciprocates in the cylinder between two fixed positions called the top dead center(TDC)-the position of the piston when it forms the smallest volume in the cylinder, and the bottom dead center(BDC)-the position of the piston when it forms the largest volume in the cylinder.