But their Numbers have dwindled since the dawn of the 20th century, with unknown consequences for ocean ecosystems and the planet's carbon cycle.

但自20世纪初以来，它们的数量已逐渐减少，随之而来的是由此对海洋生态系统和全球碳循环产生的未知后果。

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They argued that gay marriage was an experiment with unknown social consequences and should be left to the voters to decide to accept or reject it.

被告律师(在法庭上)表示，既然同性婚姻是一场社会影响未知的试验，那么还是让选民来做主。

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Early Tuesday morning, the frightening news came that Japan was facing the full meltdown of crippled reactors at a nuclear power station - with unknown and potentially catastrophic consequences.

周二一早，令人恐惧的消息传来，日本一座核电站受损的反应堆面临完全熔化的风险，后果不得而知，可能是毁灭性的。

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The election result is likely to give one party unprecedented executive and legislative control, with unknown consequences.

FORBES: Boomers Make The Fear Worse

The election result is likely to give the less-investor-friendly party complete executive and legislative control, with unknown consequences.

FORBES: Joe the Dumber

And right now, at a time of economic turmoil, the president is proposing big changes with unknown consequences.

ECONOMIST: Lexington