会议费的英文：
convention expense

convention是什么意思：
n. 大会；习俗，惯例；协议

conventional community
契约上的财产共有，约定财产共有

Convention on Succession and Administration of Estates
遗产继承和管理公约

By convention, you should follow this guideline.
所以习惯上你应该遵守这个指导原则。

The convention is scheduled for the fall.
大会定在秋季召开。

Old conventions die hard.
旧的习惯势力是不会轻易消亡的。

expense是什么意思：
n. 消费，开支；损失

duplicate expenses
使费用加倍

You will be reimburse for your expenses or your expenses will be reimburse.
你的花费将得到偿还。

All the expenses fall on me.
全部费用由我支付。

To enrich oneself at others expense
损人利己

It's handmade and hence expensive.
这是手工做的，因此很贵。