to promise solemnly, often in a formal way
郑重承诺，通常以正式方式进行 (zhèngzhòng chéngnuò, tōngcháng yǐ zhèngshì fāngshì jìnxíng)
"He swore an oath to serve his country faithfully."
"他发誓要忠实地为他的国家服务。" (Tā **fāshì** yào zhōngshí de wèi tā de guójiā fúwù)
to challenge someone to prove their authority or claim
intelligence; the ability to think
to be noticeably different or better than others
to perform extremely well on an exam or task
You are responsible for any possible danger or loss.
to buy something that is defective or worthless
