不懈

经过科研团队长达数年坚持不懈的努力，这项国家重大科技攻关终于取得了突破。

jīng guò kē yán tuán duì zhǎng dá shù nián jiān chí bù xiè de nǔ lì, zhè xiàng guó jiā zhòng dà kē jì gōng guān zhōng yú qǔ dé le tū pò.

After several years of unremitting efforts by the scientific research team, this major national scientific and technological breakthrough has finally been achieved.