Whales can sing complicated songs, sometimes it will last for an hour.

鲸鱼会唱复杂的歌，有时候会持续一个小时。

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"Sounds great," Morris replied, "but how do you make it last for an hour?"

“听起来很好。”莫里斯回答。“但我怎么能够坚持一个小时呢？”

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W:According to the schedule it should be at 9:30. It will last for an hour and a half。

根据女士所说的话，根据时刻表会议9∶30开始，持续一个半小时，那么即11：00结束。

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"It could last for an hour, " said the high school freshman.

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France says 17 militants were killed during the fighting, which witnesses said was intense and last for at least an hour.

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