We issue a warning after a big earthquake, and we can predict what the tsunami arrival times should be because tsunami speed is directly controlled by the depth of the water through which it travels.

我们一般在大地震发生之后发布海啸预警，并预测海啸的抵达时间，因为海啸速度是由它所经过的水域深度直接决定的。

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Several times each month, Allison and Bunn are still publicly cited as experts warning of this alleged imminent threat.

之后每个月几次，艾利森和邦恩仍然以专家的身份，公开就这种所谓的迫在眉睫的威胁发出警告。

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"Many times, the mimes can achieve what traffic police cannot achieve using warning and sanctions in their efforts to maintain control," he said.

很多时候，交警的警告和处罚并不能起到维持秩序的作用，倒是哑剧演员们能派上用场。

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While slightly smaller forces were capable of prevailing without a significant increase in risk in the base case of the analysis, a larger force was judged necessary to conduct these operations with acceptable risk when either enemy chemical weapons were used or shorter warning times were played.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Measure of a Superpower: A Two Major Regional Contingency Military for the 21st Century | Page: 2

"I got this warning three times, " said Mei, who asked to be identified only by her first name for security reasons.

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The deployment of the Doppler radar system in the early 1990s by the National Oceanic and Atmospheric Administration extended tornado warning lead times from five minutes to their now-annual average of 12 to 14 minutes.

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