Các tầng nghĩa / Phát âm
#1
arduous
#2
(of a task, mission or responsibility) extremely difficult; challenging; demanding
Example Sentences
保护生态环境是一项长期而艰巨的历史任务。
bǎo hù shēng tài huán jìng shì yī xiàng cháng qī ér jiān jù de lì shǐ rèn wù.
Protecting the ecological environment is a long and arduous historical task.
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