对于人们来说，在一个工作日塞进尽可能多的工作是不正常的。
This may seem abnormal to people who try to crowbar as much as possible into every workday.
对于从事零售业工作或服务业工作（如女佣、家政、庭院清理、景观美化等）的家庭来说，除非一人同时承担多份全职工作，甚至夫妻双方均兼任多份工作，才有可能过上中产阶级的生活方式。
Retail employment domestic employment (maids housekeeping yard work landscaping) never provided a middle class lifestyle unless one worked multiple full time jobs say and both parents did so.
对于大型的空间望远镜，由于发射和在轨工作环境复杂，且常要求在多波段下工作，从而使得在轨自动调焦成为必不可少的一项关键技术。
Because of the complicated launch and on-orbital working condition, and working with multiband, AF technology is a key technology for large space telescopes.
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