单词：echo-sound altimeter
单词：echo-sound altimeter 相关文章
064 The Bell A church bell tolled and its echo reached the streets. The sound of the bell seemed to be from a forest. The Bell The people thought the bell sounded strange and went into the forest to find the bell. One day, the king said to his people
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There's no doubt that a stream of giant bubbles could theoretically have sunk the U.S.S.'Cyclops'. Whether the bubbles were there or not, that's not for us to say. But I'll leave that up to the oceanographers. But could methane gas also explain the d
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Human Echolocators Use Tricks Similar to Bats Many bats use a system similar to sonar to navigate in the dark. They send out high frequency sound, sometimes as clicks, and get information about their surroundings by the timing and quality of the soun
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