例句與造句

1. These stars cross the instability strip and undergo very regular pulsations.
2. When these stars cross the instability strip they will pulsate as short period Cepheids.
3. Delta Scuti variables are found roughly where the classical instability strip intersects the main sequence.
4. Very massive stars never cool sufficiently to reach the instability strip and do not ever become Cepheids.
5. They lie near the instability strip, cooler than type I Cepheids more luminous than type II Cepheids.
6. It's difficult to find instability strip in a sentence. 用instability strip造句挺難的
7. Throughout their lifetime Delta Scuti stars exhibit pulsation when they are situated on the classical Cepheid instability strip.
8. Post-AGB stars are believed to pulsate as RV Tauri variables when they cross the instability strip.
9. The first instability strip crossing occurs rapidly during the transition from the main sequence to becoming a red supergiant.
10. Other classes of unstable main-sequence stars, like Beta Cephei variables, are unrelated to this instability strip.
11. These stars will cross the instability strip more than once and pulsate as Type I ( Classical ) Cepheid variables.
12. Their pulsations are related to the same helium instability strip on the Hertzsprung Russell diagram as that of classical Cepheids.
13. On the AGB, thermal pulses from the helium fusing shell may cause a blue loop across the instability strip.
14. 14 Persei has been calculated to lie within the Cepheid instability strip although it is not considered to be variable.
15. Uncertainty in the absolute magnitude means that the star may actually lie near the instability strip but not on it.
16. In some cases, stars may cross the instability strip for a fourth and fifth time when helium shell burning starts.
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