They proudly declared themselves part of a new autonomous province.

他们自豪地宣布自己是新自治省的一部分。

《柯林斯英汉双解大词典》

They declared themselves for the plan.

他们表示赞同这项计划。

youdao

They declared themselves against the plan.

他们声明反对这一计划。

youdao

While many Sefwi people observed some Jewish laws for centuries including refraining from work on Saturdays this group declared themselves ancestors of ancient Israelites and starting calling themselves Jews.

VOA: standard.2009.09.26

India and Pakistan declared themselves nuclear weapon states when they tested atomic bombs in 1998.

NPR: Nuclear Weapons Gain Importance for Regional Powers

Frei David alleges that half the successful candidates for black places declared themselves pardos.

ECONOMIST: Race in Brazil

In June, young protesters declared themselves aganaktismenoi (indignants) in solidarity with their Spanish counterparts.

ECONOMIST: Youth unemployment in Mediterranean Europe