mm

毫米、公厘缩写

The screen is protected by a 2 mm layer of glass.

萤幕外面有一层两毫米厚的玻璃保护。

嗯、唔口语

Mm, I see what you mean about the ending.

嗯，我明白你对结局的看法了。

嗯口语

Mm, this soup tastes even better than yesterday.

嗯，这汤比昨天还好喝。