| 1. | If a magnetic field is switched on, the symmetry is broken .
如果加上磁场，就破坏了这种对称性。 |
| 2. | This is in striking contrast with the symmetries to be discussed later .
这与后面要讨论的对称性截然不同。 |
| 3. | Time reversal invariance is a very useful symmetry in subatomic physics .
时间反演不变性在亚原子物理中仍然是一种很有用的对称性。 |
| 4. | Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry .
行星状星云是一类孤立的气体星云，具有相当程度的双侧对称性。 |
| 5. | For further analysis of seismological interest, specific symmetries of the media need to be considered .
为了进一步分析在地震学方面具有重要意义的问题，必须考虑介质的特定对称性。 |
| 6. | One first forms appropriate linear combinations of the hydrogen ao's and of the carbon ao's to get symmetry adapted orbitals .
首先，要形成氢AO和碳AO的适当的线性组合以得到对称性匹配轨道。 |
| 7. | All galaxies formed at the same time, "evolution" refers to the development of structure and to the reduction of symmetry .
所有的星系是同时形成的，所谓“演化”乃指结构的发展和对称性的变化。 |
| 8. | Electrons or any other "particle" should display wave properties to preserve the complementary wave-particle symmetry of nature .
电子及其他任何粒子都应该显示波的性质，才能体现自然界波粒互补的对称性。 |
| 9. | The existence of the entire charge on the wire is, however, taken into account when we consider the symmetry of the problem .
其实当我们考虑到这一问题的对称性时，导线上所有电荷的存在已经计算在内的了。 |
| 10. | note that charge symmetry is not a strong enough condition to deduce the existence of π°; we need charge independence.
请注意：单靠电荷对称性不足以推出的存在，我们还需要电荷无关性。 |
