A penny earned is a penny saved.
你所赚的钱便是省回来的钱。
Technology is transforming coal mining from a brute force industry to a precision operation.
"The world is a book, and those who do not travel read only one page."
统计推断的理论不是数学的一个分支,而是在不确定性下进行推理的科学。
材料的使用方式有其政治性。