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Directions: Translate the following sentences into Chinese:
1. The gravity on the moon's surface is about one-sixth as
strong as the gravity on the earth's surface.
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2. The consumption of coal in that city is five times as much as that of natural gas.
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3. The area of the farmland is almost twice smaller than it used to be.
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4. If you double the distance between two subjects, their gravitational (重力) attraction decreases four times.
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5. My new glasses cost me three times as much as the last pair I bought two years ago.
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6. The population of many cities has more than doubled in the past three years.
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7. The automatic assembly line can shorten 10 times the assembly period.
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8. In 1959 we produced a hundred-fold as much steel as we did in 1949.
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9. The earth is 49 times the size of the moon.
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10. The principal advantage over the old-fashioned machine is a four-fold reduction in weight.
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11. If the distance between two bodies is doubled, then the attraction is quartered.
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12. Super-conducting magnets can be made at least 10 times more powerful than the biggest electromagnets we have now.
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13. Researchers have produced new plastic batteries that weigh three times less than comparable conventional batteries.
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14. The pyramid was built from more than two million stone blocks, each of them twice the weight of a modern car.
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15. The town's consumption of milk in 1997 was ten times that of 1978.
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