狗在正常情况下是不会咬人的。

Gǒu zài zhèngcháng qíngkuàng xià shì bú huì yǎo rén de.

In normal circumstances dogs will not bite people.

放心，吃药后胃口不好是正常的。

Fàngxīn, chīyào hòu wèikǒu bù hǎo shì zhèngcháng de.

Don't worry, it's normal to lose your appetite after taking medicine.

紧张是正常的，你第一次上台表演嘛。

Jǐnzhāng shì zhèngcháng de, nǐ dì yī cì shàngtái biǎoyǎn ma.

It’s normal to be nervous; it’s your first time performing on stage.