数学不仅仅是一种工具；它是一种思维方式。

The coal industry has a critical role to play in providing affordable and reliable energy while we transition to a lower-carbon future.

"The best portion of a good man's life: his little, nameless, unremembered acts of kindness and love."

每一块曾经制造的塑料仍然存在于地球的某个地方——这既是我们的挑战，也是我们的责任。