You can't be afraid of people willing to hurt you, because if you fear life, then you will never live.

估计问题的性质不同。在这里，我们不关心检验特定的假设，而是关心估计参数的值。

作家是一面反映世界复杂性的镜子。

Farmers are the unsung heroes of our food system; their decisions shape the health of nations.

孩子们喜欢安静和自由选择。