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1. | My wages are the principal source of my income. |
| 薪金是我收入的主要来源。 |
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2. | their principal source of entertainment. |
| 他们乐趣的第一来源。 |
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3. | principal source of realized income |
| 已实现收益的主要来源 |
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4. | owning land or securities as a principal source of revenue. |
| 拥有土地或者有价证券作为收入的主要来源。 |
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5. | H2O, a principal source of borax. |
| 硬硼钙石,硼炭石一种天然的白色或无色脱水硼酸钙,Ca2B6O11?H2O,硼砂的主要来源 |
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6. | Incomplete combustion is the principal source of man-made carcinogens. |
| 不完全燃烧是人为致癌物的主要来源。 |
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7. | A principal source;a fountainhead. |
| 主要来源;源泉 |
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8. | A geographic region serving as a principal source of grain supply. |
| 谷物的主要产地提供谷物主要来源的地理区域 |
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9. | plunder ceased to be the principal source of accumulation; |
| 掠夺不再是积累的主要来源。 |
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10. | 2O, a principal source of borax. |
| 硬硼钙石,硼炭石一种天然的白色或无色脱水硼酸钙,Ca2B6O11?2O,硼砂的主要来源 |
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