毕竟，与面对一个浑身散发恶臭甚至淌着鲜血的流浪汉相比，面对一众听者高谈阔论应该帮助陌生人显然更加容易。
After all, it's much easier to talk to a room full of people about helping strangers than, say, actually touching a smelly and bleeding homeless man.
模仿别人对于那些有几十个流浪者组成的同类群体来说有意义，但对于数百万陌生人就不一定有效了。
What made sense to a relatively homogeneous gaggle of several dozen nomads needn't hold for millions of strangers.
比如给陌生人买咖啡，把零钱给流浪汉等， 这样的行为做起来是那么自然。
Things like buying coffee for strangers and giving money to the homeless just seemed natural.
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