舞台上挂着一块幕。
wǔtái shàng guà zháo yīkuài mù 。
There is a screen hanging on the stage.
我们需要把幕拉上来,才能开始演出。
wǒmen xūyào bǎ mù lāshànglái , cáinéng kāishǐ yǎnchū 。
We need to raise the screen before we can start the performance.
电影放映时,幕会自动下降。
diànyǐng fàngyìng shí , mù huì zìdòng xiàjiàng 。
When the movie is showing, the screen will drop automatically.