| 1. | This envelope gradually peters out with altitude .
这一包层随高度而逐渐稀薄。 |
| 2. | The outer part of the envelope now has the form of a thick shell or dust cocoon .
现在包壳的外层部分是厚壳层或尘埃包层的形状。 |
| 3. | It is not clear whether the envelope is ejected in many small spurts or all at once .
包层的抛射究竟是通过多次小喷溅，还是一次全部抛出，这并不清楚。 |
| 4. | At the point c, the star develops a convection zone extending from near the surface deep into the extended envelope .
在C点，星体产生一个对流区，从表面附近向内扩展到广袤的包层。 |
| 5. | When helium burning takes over the main burden of energy generation in the star, the core expands somewhat, and the envelope contracts somewhat .
当氦燃烧成为星体能量产生的主要来源时，核心略微膨胀，而包层略微收缩。 |
| 6. | In this model, the resulting implosion and ensuing explosion would blow off the outer envelope of the star and leave behind the core as a neutron star .
按此模型，引起的突然压缩和随后的爆发会把恒量的外部包层吹跑，留下的核成为一颗中子星。 |
| 7. | Two - dichroic - mirror cavity yb3 - doped double - clad fiber laser
双包层光纤激光器 |
| 8. | Endpumped yb3 doped double clad fiber laser
端面泵浦掺yb3双包层光纤激光器 |
| 9. | Narrow line width yb3 doped double clad fiber laser
双包层光纤激光器研究 |
| 10. | Effect of wrapping layers on baled alfalfa silage
裹包层数对苜蓿拉伸膜裹包青贮品质的影响 |
