signatory country的用法和样例：
例句
- The GATT contains a number of provisions that affect copyright protection in signatory countries.
关贸总协定中有一部分条款是关于签约国版权保护的条款。 - Since India is not a NPT signatory, the nuclear agreement between the U.S. and India is bound to pose a major challenge to that treaty.
由于印度不是禁止核武扩散条约的签约国，因此美国与印度的这些核能条约势必会对该条约是一个重大的挑战。
