直到现在，还是缺少主要服务公司和产品公司的出现。
Until now, the presence of major services and product companies has been lacking.
在全国餐馆的协调下，主要食品服务公司已同意将学校菜单中的水果和蔬菜份量翻一番。
Major food-service companies have agreed to double the amount of fruits and vegetables they offer on school menus, a deal brokered by the National Restaurant Association.
不过，公司热衷于自助服务的主要原因还是费用。
The main reason why companies are so keen on self-service, however, is cost.
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