煤炭使美国在世界范围内保持竞争力。

Use music to spread positive energy.

Every frame counts in telling the story.

你活着，你学习。你爱着，你学习。你哭泣，你学习。你失去，你学习。你流血，你学习。你尖叫，你学习。

Silence is not the absence of sound, but the presence of something deeper.

The ruling class has the means of material production at its disposal; the proletariat has nothing but their labor power.