While laying-off is a serious social problem which may be hard for the individual,it is not avoidable for free competition,because it insures the survival of the fittest in every department.

• 虽然下岗是社会的一大问题；对个人来说可能是很残酷；但对自由竞争是不可避免的；因为它确保每个领域里适者生存.