hard
Example Sentences
尽管前行的道路十分坚硬，但科研人员从未动摇攻关的决心。
jǐn guǎn qián xíng de dào lù shí fēn jiān yìng, dàn kē yán rén yuán cóng wèi dòng yáo gōng guān de jué xīn.
Although the road ahead is extremely tough, researchers have never wavered in their determination to solve the problem.
隧道掘进工地上，工人们手持高压风动凿岩机，正在艰难破碎前方阻碍施工的一块质地极其坚硬的花岗岩巨石。
suì dào jué jìn gōng dì shàng, gōng rén men shǒu chí gāo yā fēng dòng záo yán jī, zhèng zài jiān nán pò suì qián fāng zǔ ài shī gōng de yī kuài zhì dì jí qí jiān yìng de huā gǎng yán jù shí.
On the tunnel excavation site, workers holding high-pressure pneumatic rock drills were struggling to break an extremely hard granite boulder that was blocking the construction ahead.
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