| 1. | These designs have been tried in the usa .
这种设计已在美国试用。
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| 2. | The usa was a big operation, very big .
美国本身是一宗大投机买卖，非常大。
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| 3. | Cardox was invented in the usa in 1920 .
二氧化碳爆破筒是在1920年由美国发明的。
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| 4. | Next door to us there is a couple from the usa .
我们隔壁住着来自美国的一对夫妇。
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| 5. | He has emigrated to the usa and gone completely native .
他已移居美国，完全成了美国人。
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| 6. | A similar development in the usa is termed triaxial seismometer .
美国研制的与此相似的地震计称为三位地震计。
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| 7. | It was this thinking which ultimately let the usa into the vietnam war .
正是这种思想最终把美国拖进了越南战争。
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| 8. | Life in usa was competitive and offered endless opportunities for swindling .
当时美国的生活竞争性很强，欺诈的机会太多了。
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| 9. | If they offered me a job in the usa , i would jump at the chance .
假若他们给我一个职位在美国工作，我一定赶紧抓住机会不放。
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| 10. | In the usa the total quantity of additives in the year 1962 was approximately 900 mkg .
在美国，1962年总添加材料量大约为900mkg。
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