| 1. | The spiral nebulae are impressive objects .
旋涡星云是迷人的天体。 |
| 2. | The prevalent is the spiral .
常见的有盘旋形的。 |
| 3. | These rolls are corrugated cylinders, usually of the spiral type .
粉碎辊是波纹式滚筒，还常是螺旋割纹式。 |
| 4. | Experts watch the spiral development in industry with keen interest .
专家们以很大的兴趣观察工业的螺旋式的发展。 |
| 5. | A neat solution of the quadrature problem can be achieved with the spiral of archimedes .
使用阿基米德螺线可以轻松解决求积分的问题。 |
| 6. | Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness .
旋涡星云因为非常暗，难以得到它们的清晰的光谱。 |
| 7. | The lighthouse keeper led his guest up the spiral stairs to the living room on the third floor .
守灯人带领客人顺着螺旋式的梯子爬到塔楼第三层的居室里。 |
| 8. | Stars are born in these interstellar clouds, which are located in the spiral arms of our milky way galaxy
在我们银河系里，恒星就是在位于银河系旋臂上的这种星际气云中产生的。 |
| 9. | The gap occurs primarily in the center of the spiral
裂缝起初产生在螺旋中心。 |
| 10. | The mostly accepted theory of the spiral arms is the
最广为天文学界所接受的说法是 |
