1. You must countersign on this line of the contract. 你必须在合同的这一行连署。
2. You will receive our S/C and please countersign and return one copy to us for file. 您将会收到我们的销货合同，并请签署盖章后将该复印件寄回供我们存档。
3. It creates happiness in the home, fosters good will in a business, and is the countersign of friends. 它在家庭中创造快乐，在生意场上培养好感，在朋友中间传递真情。
英英解释
n.
1. a secret word or phrase known only to a restricted group
2. a second confirming signature endorsing a document already signed v.
1. add one's signature to after another's to attest authenticity
