妈妈必须同时喂养孩子的身体和精神，且精神上的需求更重于身体的需要。

The proletariat is the universal class, the class whose radical chains are capable of bursting asunder.

Sustainability is not just a goal, it's a responsibility we owe to the future.

现在是过去卷起准备行动，过去是现在展开以便理解。