The future of liberal democracy depends on its ability to address the challenges of inequality and political polarization.
Safety must always come first in mining operations.
政策变化的影响往往比简单的经济模型所暗示的更为微妙。
The ethical questions raised by CRISPR are not obstacles—they are essential conversations.
在座各位都拥有许多天赋。我确信你们的天赋之一就是拥有精明能干的头脑。之所以如此确信,是因为入学竞争十分激烈,如果你们不能表现出聪明智慧,便没有资格进入这所学校。