It's easy to spread germs that cause colds, flu and other illnesses.

这个季节很容易传播细菌，引起感冒、流感和其它疾病。

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On Twitter, for instance, a message that's not VERY brief isn't easy to spread.

比如，在Twitter上，一条不是 非常 简洁的消息并不那么容易被传播开来。

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Flu viruses can live on hard surfaces for several hours, making flu easy to spread.

流感病毒可以在硬表面存活几个小时，很容易传播。

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He believed the music was an easy and effective way to spread his message.

VOA: special.2009.10.14

The social-media element of Kickstarter, in which fundraisers can solicit money through appeals on Facebook and Twitter, makes it easy to spread the message.

BBC: Crowdfunding etiquette: How to give wisely

Their frequent mixture within humans--compounded by our misuse and abuse of these antibio-tics in soaps and meat--along with their ability to swap DNA with other species, make it easy for them to spread acquired resistance.

FORBES: Cave Woman

But the ease with which it was produced and the pace at which it went viral is another indicator of just how easy it is to spread hate in the Internet age.

FORBES: Jimmy Wong Saves the Internet