极端天气正在危害地球，专家警告说，更严重的后果还在后面。
Terrible weather events are harming the planet, and experts warn of even greater results to come.
一些市场营销专家警告说，航空公司可能会事与愿违。
Some marketing experts warn that the airlines may be going too far.
专家警告说如果鲨鱼灭绝的话，海洋食物链将遭到破坏。
If sharks go, the ocean food chain could crumble, experts have warned.
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