英语语法分析

More recently, companies have begun to plan more affordable "suborbital" flights—briefer ventures just to the edge of space's vast darkness.

最近，一些公司已经开始计划更经济实惠的“亚轨道”飞行——在太空无际黑暗的边缘进行更短时间的冒险。

But more recently, companies have begun to plan more affordable "suborbital" flights—briefer ventures just to the edge of space's vast darkness.

但是最近，公司已经开始计划更便宜的“亚轨道”飞行，在太空无际黑暗的边缘进行更短时间的冒险。

But his suborbital hop lasted just 15 minutes.

但是他的亚轨道飞行仅仅持续了15分钟。