Mumma is trying to determine if cometary water is made up of the same ingredients as our planet's water.

穆马试图证实水是否是来自彗星彗星的水组成成分应该跟地球一样。

One of the ways we analyze samples is to fly mass spectrometers through cometary debris that's coming off the comet when it's active.

一个分析样本的方法使用光谱分析仪分析透过彗星的光谱结构。

He then compared the two examples detected over Alberta with the number of high-speed fireballs seen by the same instruments that disintegrated in the upper atmosphere, and were thus, presumably, made of cometary material rather than solid rock.

然后，他将在阿尔伯塔省探测到的两个例子与利用相同仪器观测到的在高层大气中解体的高速火球的数量进行了比较。由于后者在高层大气中解体，推测其构成与一般彗星相同，不是坚硬的岩石构成的。