optimum efficiency的用法和样例：
例句
- And with each step away from the clock, our contraptions lose the cold, fast optimal efficiency of machines.
而我们的奇妙装置离开钟控的每一步，都意味着它会失去机器的客观但快速的最佳效率。 - The relation between the optimal efficiency and power output of the engines for an ideal or van der Waals gas as a working fluid is derived.
导出这类热机以理想气体或范德瓦耳斯气体为工质时的最佳效率与输出功率间的关系。
