GbEng
最近供暖设备已稍加改动以提高效率. The heating system has recently been modified to make it more efficient.
对於我们提高效率的主要目的来说, 这些想法都是次要的. Such considerations are secondary to our main aim of improving efficiency.
工程学将科学及数学原理运用于实际用途的应用手段，如设计、制造及对高效经济构造、机器、进程及系统进行操纵管理 The application of scientific and mathematical principles to practical ends such as the design, manufacture, and operation of efficient and economical structures, machines, processes, and systems.