| 1. | Their productive cycle covers several decades .
它们的生产周期可延续几十年。 |
| 2. | The empress dowager of the qing dynasty attended to state affairs for several decades .
清朝慈禧太后垂帘听政几十年。 |
| 3. | It usually takes several decades for atherosclerosis to reach an advanced stage .
动脉粥样硬化一般要经几十年才发展到晚期。 |
| 4. | For generations successive administrations had synchronized their moves with london .
几十年，历届政府与伦敦的行动步调都是一致的。 |
| 5. | When we shift to avowed novels, the turnover of the generations is an astonishing feature .
谈到公认的小说，这几十年出版的数量实在惊人。 |
| 6. | Those prepares to deprive themselves over decades may be able to achieve military dominance .
那些准备节衣缩食几十年的人可能取得军事优势。 |
| 7. | At a distance of decades i am staggered by our thoughtlessness in those years .
事隔几十年后，回顾那些年头醉生梦死的状况，着实使我惊愕不已。 |
| 8. | Drilling was slow, requiring many years and even decades to complete a single deep hole .
钻进是缓慢的，往往需要几年甚至几十年才完成一眼深井。 |
| 9. | Many ideas require years or even decades of germination before they are enacted into law .
许多构想需要几年，甚至几十年的酝酿，才能制订成为法律。 |
| 10. | A few decades ago it was discovered that the rotational velocity of the earth undergoes small variations .
几十年前，人们发现地球自转的速度有微小的变化。 |
