美国以其广阔的能力，能够在其境内容纳地球上所有的人口。
The United States, in their expansive capacity, are capable of containing within their limits the whole population of the earth.
Success is not the key to happiness. Happiness is the key to success.
The method of psychology must be strictly controlled.
清洁：身体、衣服及住所，力求整洁。
The interplay between light and matter at attosecond timescales reveals a universe far more dynamic than we ever imagined.