过去经常有人通过帮别人做这些事来赚钱。
Frequently, someone used to get a paycheck for doing these things.
过去经常有人援引机器部件的数据和规格来说明这家工厂产品的优劣。
Data and specifications for the machine parts were often cited to demonstrate the merits and demerits of the factory's products.
过去经常有人援引机器部件的数据和规格来说明这家工厂产品的优劣。
Data and specifications for the machine parts were often cited to demonstrate the merits and demerits of the factory's products.
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