To blow-dry one's hair in English is to use a hair dryer to dry and style one's hair by directing the airflow from the dryer onto the hair. This can be done at home or at a salon. The phrase "blow-dry" comes from the verb "to blow," which means to move air out of the mouth or to use a machine to create airflow.

Here are some examples of how you might use the phrase "blow-dry" in English:

I like to blow-dry my hair after I wash it to add volume and reduce frizz.

The salon offers a blow-dry service where they will style your hair using a hair dryer.

My hair takes a long time to air-dry, so I usually blow-dry it to save time.

In Chinese, "吹头发" (chuī tóufǎ) is the most common way to say "blow-dry hair." The verb "吹" (chuī) means "to blow," and "头发" (tóufǎ) means "hair."

Here are some examples of how you might use the phrase "吹头发" in Chinese:

我喜欢洗完头发后用吹风机吹头发，这样可以增加卷度，减少卷曲。(Wǒ xǐhuan xǐ wán tóufǎ hòu yòng chuīfēngjī chuī tóufǎ, zhèyàng kěyǐ zēngjiā juǎndù, jiǎnshǎo juǎnqū.)

这家美发沙龙提供吹头发服务，他们会用吹风机为你的头发造型。(Zhè jiā měifǎ shālóng tígōng chuī tóufǎ fúwù, tāmen huì yòng chuīfēngjī wèi nǐ de tóufǎ zàoxíng.)

我的头发自然干得很慢，所以我通常会用吹风机吹头发以节省时间。(Wǒ de tóufǎ zìrán gān de hěn màn, suǒyǐ wǒ tōngcháng huì yòng chuīfēngjī chuī tóufǎ yǐ jiéshěng shíjiān.)