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| 51. | (chemistry) law stating that when two elements can combine to form more than one compound the amounts |
| （一化学定律）说明当两种元素结合成一种以上化合物时，其中一种的数量与定量的另一种成简单倍数关系。 |
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| 52. | He has been less than diligent in his form work and shows none of the promise of earlier years. |
| 他在提高竞技状态方面不够刻苦，再也不像早年那样显得有出息了。他当然总是不如同龄人那样对享乐或人生感兴趣，也许是他呆在原地不动的时间太长了。 |
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| 53. | software in part or whole, either in person or online to a third party before it has been made unique (a form |
| 禁止正式购买者对购入本素材光碟以及本素材光碟收录资料中的一部分，或者全部原封不动（创作音声作品以外的状态）向第三者转让、交换、贩卖、流通、租借以及复制、线上公开、使用等行为。 |
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