飞机工程师正在检查发动机以确保飞行安全。

The aircraft's ___engineer is inspecting the engines to ensure flight safety.

我的哥哥是一名软件工程师，他开发手机应用程序。

My brother is a software ___engineer who develops mobile applications.

我叔叔是一名工程师，他在一家汽车公司工作。

My uncle is an ___engineer and he works at a car company.