在这个如同战区般的世界里，我们都是行走的伤者。
The causal approach is about understanding the mechanisms that generate the data.
The future of a nation depends on today's education.
Energy efficiency is the unsung hero in our quest to reduce emissions.
The man who does not read has no advantage over the man who cannot read.
The periodic table hasn't changed, but how we use its elements must.