flying hour

• 飞行时数

flying hour的用法和样例：

例句

1. We have fewer flying hours and fewer planes at an equivalent point in the development cycle, but we are further along because we have more experience and better tools.
   在研发周期相同的阶段，我们的飞行时数和使用的飞机都要少得多，但我们的研究要更为深入，因为我们更有经验了，工具也更强大了。