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许多机械操作如今靠计算机程序来实现。(program)

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那个水管工的年收入在十万以上。(annual)

这家社区学院在过去的五年中一直在扩大规模。(expand)

安装这台机器需要多人协作。(install)

Most occupations that can be referred to as “blue-collar” depend on some kind of skills, plenty of training and technical knowledge. Several professions are widely found in today's workforce, and the most highly-skilled workers will have the best opportunities for work in these occupations. What's more, the pay for these jobs is almost as much as that for many so-called white collar jobs, and quite often, depending on the industry, these workers even make much more than the average American worker.