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| 1. | Most viruses are spherical or roughly spherical. |
| 多数病毒呈圆形或近似圆形。 |
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| 2. | A roughly spherical, expanding shock wave is visible in X-rays. |
| 利用X光波段，可以观测到一个大致上呈现球形膨胀的震波。 |
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| 3. | The diameter of the nucleus, if we think of it as roughly spherical, is of the order of 10-14m. |
| 如把原子核粗略地看作球形，则它的直径的数量级为10－14m。 |
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