英语语法分析

Wz Y: I bought this phone from a net friend, I have no receipts.

涠洲y：我买了一个网友这个电话，我没有收据。

The WZ-5A is fitted with a combined inertial and GPS navigation system for improved accuracy.

WZ - 5 A配备有一套组合惯性和GPS导航系统用于提高精度。