travel expense 差旅费
travel expense voucher 差旅费凭单
travel expense of handling equipment [交] 装卸机械走行费
Taking out travel insurance may seem an unnecessary expense, but it is a must.
旅游保险费用看起来似乎是没必要的，但却是必不可少的开支。
Overall, learning that can be effectively done remotely should be done remotely regardless of whether there are travel expense constraints.
总的来说，不管是否有差旅费的限制，都可以有效地实施远程学习。
Accommodation is also a major travel expense.
住宿也是一项主要的差旅经费。
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