不管年龄是多少，任何成像过程的一个引导原则就是辐射应该受限制——或“锥形”——对于被检查的部位来说。
A guiding principle for any imaging procedure, regardless of age, is that radiation should be limited - or "coned" - to the area being examined.
只有那些与一致性快照相符的镜像被写到检查点文件，行影子使当前执行的事务可以在检查点创建期间不受限制地运行。
Only those images that correspond to a consistent snapshot are written to the checkpoint file, and the row shadows allow the currently executing transactions to run unrestricted during checkpointing.
持有受限空间进入许可证并检查是否准确。
Permits for entry have been raised and checked for accuracy.
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