至于在网上做销售和市㘯营销对元器件实际成本，或者说总材料帐单有什么影响，值得责疑。
It is questionable as to what impact does online sales and marketing have on the actual cost of components or the total bill of materials.
“疑病症”统指那些身体本身很健康，但是总担心得病，所以时常服用一些药物防病的人。
Thee term "worried well" generally refers to people who are healthy, but fear becoming ill and take medication they don't actually need to try to prevent it.
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