英语语法分析

It was made using a technique known as heliogravure.

它是由一种叫凹版拍摄的技术完成的。

It is an image of an engraving of a man walking a horse and it was made using a technique known as heliogravure.

照片照的是一幅版画，内容是一个人牵着一匹马在走。 它是由一种叫凹版拍摄的技术完成。