pulsating star造句

例句与造句

1. This makes space telescope invaluable for identifying a rare class of pulsating stars , called cepheid variable stars embedded within m100 ' s spiral arms
   这对于从m100的旋臂中分辨出暗藏的造父变星有着莫大价值。
2. Astronomers made observations of cepheid variable stars [ pictured above ] ? pulsating stars used to measure vast distances ? in the virgo and other clusters to establish the expansion rate and the universe ' s age
   天文学家用哈勃观测到仙女星座和其它星群中的造父变星(如图) ，以确定宇宙的膨胀速度和宇宙的年龄。
3. It's difficult to find pulsating star in a sentence. 用pulsating star造句挺难的