| 1. | Cyclization occurs readily with dilute alkali .
遇到稀碱就容易环化。
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| 2. | The thought of resigning never occurred to me .
我从来没想过要辞职。
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| 3. | Lassitude occurs early in the course of the disease .
病初出现疲倦。
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| 4. | This deal occurred in a pairs event .
这局牌是一次双人比赛中出现的。
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| 5. | A strong objection at once occurred to us .
我们立刻遇到强烈的反对。
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| 6. | A condensation to quinoid systems occurs .
发生了醌型体系的缩合反应。
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| 7. | Wounds frequently occur as a result of pruning .
修剪往往造成损伤。
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| 8. | Hyperglycemia and glycosuria tend to occur .
可能发生血糖过高或糖尿。
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| 9. | However, two other manifestations may occur .
继而会出现其他两种表现。
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| 10. | It occurred only on "hybrid habitats" .
它只在“杂种生境”内表现出来。
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