对于那些时间要求精确到秒的媒体和交互式服务来说，用4 G再合适不过了。
4g will be suitable for media and interactive services for which timing on the second is essential.
原材料被搬入装/卸载平台，这样不同生产任务的转换时间可以精确到秒，而不是精确到分。
The material is carried to load/unload tables, which enable job changeover times to be measured not in minutes but in seconds.
纳秒级时间戳 大部分的文件系统（包括 ext3）都包含有精确到秒的时间戳数据，而 ext4 把精确度提高到了纳秒。
Nanosecond timestamps Most file systems, including ext3, include timestamp data that is accurate to a second. Ext4 extends the accuracy of this data to a nanosecond.
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