在很多国家，老师被认为是一种值得尊敬的终身职业。

Zài hěn duō guójiā, lǎoshī bèi rènwéi shì yì zhǒng zhídé zūnjìng de zhōngshēn zhíyè.

In many countries, teaching is regarded as a respectable lifelong profession.

他认为婚姻是一种终身的承诺，不能轻易放弃。

Tā rènwéi hūnyīn shì yì zhǒng zhōngshēn de chéngnuò, bù néng qīngyì fàngqì.

He believes that marriage is a lifelong commitment that cannot be given up easily.

他发誓要终身学习，不断提高自己。

Tā fāshì yào zhōngshēn xuéxí, bùduàn tígāo zìjǐ.

He swore to be a lifelong learner and keep improving himself.