老实说

老实说，这项突破国外长期技术封锁的深海钻探核心装备研制极其艰难，但科研全组人员誓不言弃。

lǎo shí shuō, zhè xiàng tū pò guó wài zhǎng qī jì shù fēng suǒ de shēn hǎi zuān tàn hé xīn zhuāng bèi yán zhì jí qí jiān nán, dàn kē yán quán zǔ rén yuán shì bù yán qì.

To be honest, it is extremely difficult to develop this deep-sea drilling core equipment that breaks through the long-term foreign technical blockade, but the entire scientific research team will never give up.