Definition (支付)
When an amount of money is paid up front, it is paid in advance, before a service is provided or a task is completed.
预付
The supplier required thirty percent of the cost up front to secure their commitment.
供应商要求提前支付30%的费用以确保他们的承诺。
This company requires all clients to pay up front before they begin any work.
这家公司要求所有客户在开始工作之前预先付款。
I usually don't like paying large amounts of money up front unless I really trust the other party.
我通常不喜欢预付大笔款项，除非我真的很信任对方。