煤炭仍将是能源结构的一部分，但其角色必须为更清洁的未来重新定义。
Coal will remain part of the energy mix, but its role must be redefined for a cleaner future.
写作是我存在于世界的方式。
If you are brave to say 'good bye', life will reward you with a new 'hello'.
男性和女性在短期择偶欲望上存在差异，因为这对我们祖先的繁殖利益和代价不同。
Sustainability in agriculture is not an option—it's a necessity for the future of our planet.