一个异步方法能返回一个Future对象，该对象使得客户端可以获得一个结果值、检查异常或者尝试取消正在进行中的调用。
An asynchronous method can return a Future object that allows the client to retrieve a result value, check for exceptions, or attempt to cancel an in-progress invocation.
如果先前的检查点已经在进行中，由日志切换引起的检查点会覆盖当期的检查点。
If a previous checkpoint is already in progress, the checkpoint forced by the log switch will override the current checkpoint.
时时检查你的时间安排和现在已经进行中的项目。
Examine every opportunity along the lines of time vs. projects already underway.
检查正在进行中的事件！
是否在之前一检查，在准备讨论会时或者适合寻找综合策略的想法，-实践和进行中-的一切有机化学家将受益于读这本辅助练习册。
Whether prior to an examination, for preparing seminars or for ideas in looking for synthesis strategies, every organic chemist - practicing and ongoing - will profit from reading this workbook.
是否在之前一检查，在准备讨论会时或者适合寻找综合策略的想法，-实践和进行中-的一切有机化学家将受益于读这本辅助练习册。
Whether prior to an examination, for preparing seminars or for ideas in looking for synthesis strategies, every organic chemist - practicing and ongoing - will profit from reading this workbook.
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