You could say 'business travel' for the general topic, or 'a business trip' for a specific trip.
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Do you mean business travel?
2014年8月28日
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Business travel
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You could say...
I travel for work.
I am on a job/work related trip.
This trip is not for pleasure.
I am working on this trip.
If you provide the context, sentence, it would help.
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you could also say, "i am traveling on business"... it sounds strange, but it is a common statement by those who are traveling for work.