这种病毒主要通过空气传播,老人和儿童更容易被感染。Zhè zhǒng bìngdú zhǔyào tōngguò kōngqì chuánbō, lǎorén hé értóng gèng róngyì bèi gǎnrǎn.This virus is mainly transmitted through the air, and older people and children are more easily infected.
她的笑声感染了在场的每一个人。Tā de xiàoshēng gǎnrǎn le zàichǎng de měi yí gè rén.Her laughter was infectious and affected everyone present.
伤口没有处理好,很容易感染。Shāngkǒu méiyǒu chǔlǐ hǎo, hěn róngyì gǎnrǎn.If a wound isn't treated properly, it easily becomes infected.