当使用默认的 bash 终端设置在后台运行作业时，bash 通常会捕获 SIGCHLD 信号并在打印下一个终端输出行之后 打印消息。
When you run a job in the background with default bash terminal settings, bash normally catches SIGCHLD signals and prints a message after the next terminal output line is printed.
橡胶促进剂母粒造粒机密炼机的团状料经提升机，锥双喂料机，挤出机，切粒，冷却，筛分，终端料仓全部自动化，流水作业。
Granulation of Accelerator masterbatch confidential internal mixer-material hoist, conical double feeder, extruder, pelletizing, cooling, screening, Terminal bin full automation, assembly-line.
目的了解视屏显示终端(VDT)作业对女职工生殖功能的影响。
Objective to study the effect of video display terminal (VDT) on reproductive function of female operators.
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