There are two aspects of the free-rider problem apparent in this simple mathematical model.

在上面简单的数学模型中，我们可以发现搭便车问题的两点含义。

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The lack of incentive for individuals to contribute to a social good is known as a free-rider problem.

个人没有动力向社会事业捐款的现象被称为搭便车问题。

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As its rider tried to free it, the horse kicked out and rolled over, crushing her.

当骑手设法把它放开的时候，那匹马一阵踢，又一打滚，把她压伤了。

《柯林斯英汉双解大词典》

When societies cooperate with the aim of creating a public good, there is always the possibility of a free-rider.

VOA: special.2009.03.03

A free-rider uses the public good without helping to create or support it.

VOA: special.2009.03.03

A free-rider might refuse to donate money but still enjoys watching the programs.

VOA: special.2009.03.03

Remove that insurer mandate and the free-rider problem is a thing of the past.

FORBES: The Libertarian Challenge To ObamaCare

All for a policy that will only exacerbate the free-rider problem.

FORBES: Obama's Top Lawyer: If You Don't Like The Individual Mandate, Earn Less Income

Mr. Jones barely missed qualifying for the 1998 Winter Olympics as a snowboarder and then gave up racing to become a mountain free-rider.

WSJ: Snowboarder Jeremy Jones's Secret Code of Snow | Creating