I don't claim to be an expert.

我不敢自称为专家。

She can now legitimately claim to be the best in the world.

现在她可以理所当然地声称自己是世界上最优秀的。

I do not claim to be an authority.

我并不宣称自己是权威人士。

I make no claim to be a paragon.

我没有说过自己是完人。

They claim to be the party of law and order.

他们声称自己是重视治安问题的政党。