隧道

这种前沿探索为进一步深化现代隧道研究提供了宝贵的第一手资料。

zhè zhǒng qián yán tàn suǒ wèi jìn yí bù shēn huà xiàn dài suì dào yán jiū tí gōng le bǎo guì de dì yī shǒu zī liào.

This cutting-edge discovery provides valuable primary materials for further research on modern tunneling.

经过建设者数千个日夜的艰苦掘进，这条长达二十公里的特长特大高原铁路隧道顺利贯通。

jīng guò jiàn shè zhě shù qiān gè rì yè de jiān kǔ jué jìn, zhè tiáo zhǎng dá èr shí gōng lǐ de tè cháng tè dà gāo yuán tiě lù suì dào shùn lì guàn tōng.

After thousands of days and nights of hard work by builders, this 20-kilometer-long extra-long plateau railway tunnel was successfully completed.