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.
預付
The supplier required thirty percent of the cost up front to secure their commitment.
供應商要求提前支付30%的費用以確保他們的承諾。
This company requires all clients to pay up front before they begin any work.
這家公司要求所有客戶在開始工作之前預先付款。
I usually don't like paying large amounts of money up front unless I really trust the other party.
我通常不喜歡預付大筆款項，除非我真的很信任對方。