This book is written for those who can't or don't want to expend the time or money required to attend formal classes.
这本书是写给那些不能够，或是不愿意花费时间和金钱去专程上语言学习课程的人。
We expend a significant amount of money to support our undergraduate students and of course for our graduate students.
我们每年花费大量的资金支持我们本科生奖学金项目，当然研究生奖学金项目也一样支持。
History has taught us: never underestimate the amount of money, time, and effort someone will expend to thwart a security system.
历史教育我们：有些人为了破解一个安全系统是不惜代价的。
History has taught us: never underestimate the amount of money, time, and effort someone will expend to thwart a security system.
历史教育我们：有些人为了破解一个安全系统是不惜代价的。
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