adj.带正负号的；已签字的
动词sign的过去式和过去分词.
The football team has signed two new players. 该足球队已签约聘用了两名新队员。
The Government has signed a treaty with Moscow. 政府已与莫斯科签了一项条约。
The buyer and seller have signed the contract. 买卖双方已经签定了那项合同。
They signed the agreement and the documents appended thereto. 他们签署了协议与附件。
They signed a petition in support of the workers' demands. 他们在请愿书上签名，支持工人的请求。
A signed invoice presumes receipt of the shipment. 经过签字的发票表示货物已经收到。
At thirty, he signed on as first mate with a cargo ship. 他30岁时受雇于一艘货船当了大副。
vt.交付；放逐；委托
vt.再交付；交还；再分配
adj.未签约的；未签名的；无符号的
