No president who performs his duties faithfully and conscientiously can have any leisure.
健康的森林生态系统同时支持自然和商业。
The world changes by your example, not by your opinion.
外交需要克服短期利益的诱惑,着眼于长远利益和全球发展。
If you've never tried, how will you ever know if there's any chance?