| 1. | Crazing is the invariable precursor of brittle fracture .
出现小裂纹必然是脆性断裂的前兆。
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| 2. | These include the chlorophyll precursor protochlorophyllide a .
这些受体包括叶绿素的前体原叶绿酸a。
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| 3. | In the past this had been the precursor to strong decisions .
要是在过去，这就是要采取强力行动的预兆。
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| 4. | The immediate transcript of a trna gene is known as precursor trna .
TRNA基因的直接转录物叫做tRNA前体。
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| 5. | Cyanide can serve as precursor for the amide nitrogen of asparagine .
氰化物可以作一个天门冬酰胺的酰胺氮前体。
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| 6. | Hobbes is a precursor of modern positivism and analytical jurisprudence .
霍布斯是现代实证主义法学和分析法学的先驱。
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| 7. | In plant cells the principal precursor of alanine, as well as leucine and valine, is pyruvate .
植树细胞中丙氨酸和亮氨酸、缬氨酸的主要前体是丙酮酸。
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| 8. | Most dolomite is obviously the result of replacement of precursor calcite but certainly not all .
多数白云石显然是原来方解石交代的结果，但肯定不是全部。
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| 9. | Thiophene, a highly common substance, serves as a versatile precursor to a variety of amino acids .
噻吩是一种很普通的物质，它可以作为合成各种氨基酸的母体。
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| 10. | Exogenously supplied aspartate is not an active precursor of asparagine in plant tissues .
外来供给的天门冬氨酸，在植物组织中并不是一个活跃的天门冬酰胺前体。
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