There are five nations recognized under the NPT, the Nuclear Non-Proliferation Treaty.

有5个国家遵守NPT, 即《不扩散核武器条约》。

But the NPT is being questioned more than at any time in its past.

但是《不扩散核武器条约》正遭受前所未有的质疑。

Iran will leave the Non-Proliferation Treaty (NPT) if the dispute over it is sent to the UN Security Council.

如果涉及《核不扩散条约》的争端提交给联合国安理会，那伊朗将退出该条约。

The result was the 1970 Non-Proliferation Treaty (NPT).

其结果是 1970 年的不扩散条约 (NPT)。