用磁卡登记姓名以示离开，如离开商业活动的场所时习惯用语。
Card out To sign out, as from a place of business, by use of a magnetic card.
非正式用语。商业或产业界的富有且势力大的人物。
Informal. A rich and powerful person in business or industry.
非正式用语。商业或工业界的富有且权势大的人物。
Inacademic. A affluent and able being in business or industry.
英语是非常对重要！英语是最广泛使用语言，绝大部分商业信函被用英文写作。
English is the most widely used language, most business letters are written in English.
英语是非常对重要！英语是最广泛使用语言，绝大部分商业信函被用英文写作。
English is the most widely used language, most business letters are written in English.
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