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Useful synthetic reactions of organoaluminacycles, such as reactions with a variety of electrophiles, alkylation reagents, and metal-mediated coupling reactions are presented.
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本文介绍近年来有机铝杂环化合物的合成方法学、反应化学及其在有机合成中的应用研究进展。 |
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Usefully it also incorporates a braze-on type front derailleur mount, so extending the gear range shouldn't be a problem.
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同时上面也贴心的预留前变速器组装位置，在未来升级时不会有任何问题。 |
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Usefulness is not impaired by imperfection. You can drink from a chipped cup.
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缺陷并不能影响用途，有缺口的杯子也可以拿来喝水。 |
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Usefulness: A process description should be detailed enough to be useful, not so detailed that it is unusable.
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可用性：一个过程描述应该足够详细以使其可以在实践中应用，但是过于详细反而无法应用。 |
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User Application. These applications are usually started by a logged in user.
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用户应用程序。通常由用户发起。 |
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User Contributions:
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用户贡献: |
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User Interface: accept and analyze inquiries of user, and return the final results.
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用户界面：接受并解析用户的查询，最后返回查询结果。 |
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User agent default values and user preferences.
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用户代理默认的值和用户偏好。 |
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User can activate or deactivate the specifications in COLUMN on GUI and can generate that into keyword.
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用户可以激活或关闭图形界面中的COLUMN模块中的工艺规定并能放入关键字文件中。 |
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User can now only select one team as their feeder club at any one time from the news item.
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玩家只能从新闻栏中选择一个俱乐部为关联俱乐部。 |
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User can search their online catalogue, or browse for titles in the nine departments: Biology &Ecology, Conservation &Biodiversity, Natural History &Travel, Palaeontology &Evolution, Earth &Environmental Sciences, Sustainable Development, Reference, etc.
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用户可以通过著者、题名等入口直接检索在线目录，也可以通过浏览主题分类目录（包括：生物学与生态学、自然保护与生物多样性、古生物学与进化、地球科学与环境科学等九大类）了解相关信息。 |
