求翻译：13.1正常的建设工程造价咨询业务，附加工作和额外工作的酬金，按照建设工程造价咨询合同专用条款约定的方法计取，并按约定的时间和数额支付。是什么意思？

13.1 normal construction engineering cost consulting business, the remuneration of the additional work and additional work, in accordance with the terms of the construction engineering cost consulting contract agreed method of take, in accordance with the agreed time and the amount of payment.

13.1 normal building construction cost consulting business, a