yī lǎng伊朗bèi被zhǐ xiàng指向zhōng guó中国gòu mǎi购买dǎo dàn导弹yuán liào原料，měi guó美国biǎo shì表示guān zhù关注
Recently, there have been reports that Iran bought a lot of materials from China that can be used to make missiles.
The US government said they are aware of this news but have not confirmed if it is true.
The US believes that Iran's missile program poses a great threat to world security.
The US has been working to reduce Iran's ability to make missiles and also wants to stop Iran from getting more materials to make missiles.
The US also said they will continue to take actions to prevent Iran from developing nuclear weapons and supporting terrorist organizations.
Some media reported that these materials are enough for Iran to make many missiles.
Currently, the US and Iran are also discussing Iran's nuclear issues.
The US hopes that through these efforts, the world will become safer.