有研究显示，已婚的人比单身的人快乐。

Yǒu yánjiū xiǎnshì, yǐhūn de rén bǐ dānshēn de rén kuàilè.

Studies show that married people are happier than single people.

医生正在研究治疗新病毒的药物。

Yīshēng zhèngzài yánjiū zhìliáo xīn bìngdú de yàowù.

Doctors are researching medicine to cure the new virus.

在研究过程中，我们坚持不用动物来做实验。

Zài yánjiū guòchéng zhōng, wǒmen jiānchí bù yòng dòngwù lái zuò shíyàn.

During the research process, we insisted on not using animals for experiments.