time sh -c 'command' 统计命令的执行时间
Similarly, if you run the runclock3.sh script of Listing 4, and press Ctrl-c in the terminal window where the script is running, the script will immediately terminate without shutting down the clock.
类似地，如果运行清单4中的runclock3 . sh脚本，并在运行脚本的终端窗口中按下Ctrl - c，脚本会立即终止，但是没有关闭时钟。
When the command is ready to be executed, AIX will fork the process as sh -c exec .
当命令准备执行时，AIX 将以如下方式启动子进程：sh -c exec 。
The mechanisms are probably that zinc can regulate the receptor of liver cell for HDL-C and LDL-C, compete with arsenic for -SH binding and precipitate the excretion of arsenic.
可能与锌调节肝细胞相应受体、与砷竞争性结合琉基、促进砷的排泄有关。
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