出差费的英文：
allowances for a business trip

参考例句：

The company is sometimes very cheap with the travel expenses.
公司有时在出差费用上非常小气。

allowances是什么意思：
n. 允许；津贴；限额；折扣；零用钱

This agenda does not allow compromise.
这一议程容不得商量。

Allow me to introduce myself.
允许我把我自己向你介绍。

The ship was dry and no liquor was allowed.
船上是禁酒的，不准卖含酒精的饮料。

business是什么意思：
n. 商业，交易，生意；公司，商店；事情；职责

Be engaged in; be Busy in
从事于

to sit for business
因公滞留

As Busy as a bee
(象蜜蜂)忙忙碌碌的

trip是什么意思：
n. 旅行；行程；跌倒，失足；失误；轻捷的步伐
v. 绊倒；失足；使失误，使犯错误；轻快地走

The trip needs careful planning.
这趟行程需要周密计划。

The trip bushed us.
旅行使我们筋疲力尽。

They chartered a bus for the trip.
为这次旅行他们租了一部巴士。