Michelle has had a very different background-very stable, two-parent family, mother at home, brother and dog, living in the same house all their lives.
米歇尔的家庭背景则完全不同——非常稳定的双亲家庭，母亲呆在家里，有兄弟，有养狗，一直住在一栋相同的房子里。
Because the child process is running in the background, control returns to the shell as soon as the parent dies.
由于子进程在后台运行，父进程一终止，控制即返回到Shell。
The results showed that the principal factors affecting the metal background contents were landforms for plain area and soil parent material for mountain area.
分析结果表明，影响土壤元素背景值的主要因素，在平原地区是地貌条件，在山区是成土母质。
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