英语语法分析

The parallax principle can be extended to measure the distances to the stars.

视差原理可以扩展到测量地球到恒星的距离。

Knowing the width of Earth's orbit, the parallax shift lets astronomers calculate the distance.

知道了地球轨道的宽度，视差偏移可以让天文学家计算距离。

Halley realised that Mercury was so far away that its parallax angle would be very difficult to determine.

哈雷意识到水星离地球如此之远，以至于很难确定它的视差角。