* Breast milk: This is the most common meaning of "nai".
* Cow's milk or other animal milk: This usage is also common.
It's important to note that the pronunciation of "nai" in Mandarin Chinese is nǎi.
Here are some examples of how "nai" is used in Mandarin:
* 母乳 (mǔ rǔ): Breast milk
* 牛奶 (niú nǎi): Cow's milk
* 羊奶 (yáng nǎi): Goat's milk
* 奶粉 (nǎi fěn): Milk powder
If you need to express a more specific type of milk, you can use the appropriate noun before "nai". For example, "豆奶 (dòu nǎi)" means soy milk.