Number + 幕
幕 (mù) is a measure word (classifier) used for scenes, acts in a play, or memorable moments. It is used with a number or demonstrative to count distinct scenes or dramatic moments. For example, 一幕 means 'one scene' or 'a single episode.'
这一幕让在场的所有人都感动了。
zhè yí mù ràng zàichǎng de suǒyǒu rén dōu gǎndòng le.
This scene moved everyone present.
电影里最精彩的一幕是结尾的对话。
diànyǐng lǐ zuì jīngcǎi de yí mù shì jiéwěi de duìhuà.
The most brilliant scene in the movie is the dialogue at the end.
那天发生的一幕我到现在都忘不了。
nà tiān fāshēng de yí mù wǒ dào xiànzài dōu wàng bù liǎo.
I still can't forget what happened that day.