For individual travelers, requirements such as hotel reservation, air tickets, travel insurance, etc. are required.

对于个人旅游者来说，则需要如酒店预定房间的证明、机票、旅游保险等。

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To apply for the L visa, the applicant shall, as required, submit travel plans and itinerary and other material;

申请L字签证，应当按照要求提交旅行计划行程安排等材料；

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Training is given as part of Hua Dan's ongoing staff development and staff are sometimes required to travel for short periods to other cities for training and workshops.

花旦会持续性的给予花旦的员工相关的培训，并且有的时候需要员工到其它城市出差和做工作坊。

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Joan Curto griped almost constantly years ago about the heavy travel required by her job as a national accounts manager for a drug company, says her former boss, Trevor Blake.

WSJ: What to Do With a Workplace Whiner

Menendez could have invoked what is known as a "friendship exemption" regarding the two personal trips, which would have required the senator to report the travel to the Senate Ethics Committee as a gift.

NPR: Menendez: Reimbursed Donor $58.5K For 2 Trips

While those dreaded fees and excess charges won't be going anywhere in 2012, one welcome change to air travel this coming year is that airlines will be required to list mandatory charges in their advertised prices as of 24 January.

BBC: In brief: Airlines to list mandatory fees