Scientists think this is the plants' way to prevent the spread of any tree diseases and make life more difficult for leaf-eating insects like caterpillars.

科学家认为，这是植物防止树木疾病传播的方法，并给像毛毛虫之类的食叶昆虫制造些生存上的困难。

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But don't downplay it. Undiagnosed asthma can make life more difficult and could even be deadly.

但是，不要低估它，哮喘能够让人们的生活更加困难，甚至致命。

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Writing software is complex enough already, don't make your life more difficult!

编写软件已经够复杂的了，不要让你的生活更困难。

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The rise of Tizen will make life more difficult for Microsoft (MSFT) and Research In Motion (RIMM).

FORBES: Tizen Cued Up For Assault On iOs, Android

On many practical questions, from dealing with traffic police to finding the sugar in a supermarket, not speaking Hebrew can make life more difficult.

WSJ: Moving to Israel: An American Couple's Experience

While higher interest rates may make life more difficult for those already overburdened with large mortgages, low rates are helping to maintain, and even aggravate, an overvalued property market.

ECONOMIST: On the debt crisis, Egypt