网上交付现在大约要两到三个星期，但是这样能让苹果公司调整库存变化。
Online delivery is currently estimated for two to three weeks, but this may adjust as Apple's inventory changes.
幸运的是，Lucene的类IndexWriter提供了三个参数用来调整缓冲区的大小以及往磁盘上写索引文件的频率。
Fortunately, Lucene's IndexWriter class exposes three parameters to let you adjust the size of the buffer and the frequency of the disk writes.
IT时间表调整需要对三个不同但又相互联系的事件时间安排具备敏感性。
It calendar alignment requires sensitivity to three different but interrelated areas of event timing.
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