In contrast, unfavorable conditions that occur unpredictably pose considerable problems for organisms.

相反，不可预测的不利条件会给生物体带来相当大的隐患。

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In accordance with the stress-triggering hypothesis, faults are unpredictably responsive to subtle stresses they obtain as neighboring faults shift.

根据应力触发假说，断层不可预测地对邻近断层移动时所获得的微妙应力作出反应。

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Rainfall in the Maya homeland is unpredictably variable between years; some recent years have had three or four times more rain than other years.

玛雅故土的降雨量在不同年份是变化莫测的；最近几年的降雨量比其他年份多三到四倍。

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The study found that levels of inmate-on-inmate violence were unchanged, and that levels of inmate-on-staff violence changed unpredictably, rising in Arizona, falling in Illinois, and holding steady in Minnesota.

NEWYORKER: Hellhole

Tim Minchin's riotously eclectic score skitters unpredictably from pop to jazz to semi-Sondheim to good old-fashioned razzmatazz.

WSJ: Matilda the Musical��Triumph of the Smart; The Last Five Years, Revived | Theater By Terry Teachout

Right now, the critical barriers to entry for an entrepreneur with a disruptive idea (read: technology which may scale exponentially and unpredictably) are gaining access to low-cost, efficient infrastructure, implementing extremely complex software to maximize compute power and storage, and minimizing maintenance concerns.

FORBES: How Cloud Computing Can Boost Developing Nations