My son, an electronics engineer, produced from his pack a hand-held Global Positioning System receiver.

我的儿子是位电子学工程师，他却马上从包里拿出一个全球定位系统接收器。

youdao

My son, an electronics engineer, produced from his pack a hand-held Global Positioning System receiver.

我的儿子是位电子学工程师，他却马上从包里拿出一个全球定位系统接收器。

youdao