Definition: An agreement that is in writing is official and is proof of that agreement. Level: B2
请以书面形式确认您的预订。
Please confirm your reservation ___in ___writing.
我以书面形式告诉您我想帮助您。
I am telling you ___in ___writing that I would like to help you.
合同必须以书面形式达成协议才具有法律约束力。
The contract must be agreed upon ___in ___writing to be legally binding.
