The document was signed by the manager.

这份文件是由经理签署的。

The book was signed by Christie herself.

这本书是由克里斯蒂本人签名的。

The contract was duly signed by both parties.

合同被双方适当地签署了。

The contract was formally signed by both parties.

合同已被双方正式地签署。

The cession agreement was signed by both parties.

双方签署了割让协议。

The treaty was ceremoniously signed by both parties.

条约由双方隆重地签署。

The document of enfeoffment was signed by both parties.

授予地产的文件由双方签署。

The agreement was consensual and signed by both parties.

该协议是一致同意的，并由双方签署。

The document was signed by an authorized representative.

该文件由授权的代表签署。

The novation agreement was signed by all involved parties.

所有相关方都签署了新债代旧债协议。