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He did this through a device that pinged at random points in time.
他通过能及时在任意点发出呯的声响的装置做了这个记录.
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In clouds the mosquitoes came, and pinged and buzzed and bit till we were nearly mad.
蚊子密密麻麻地飞来, 嗡嗡地叫着,叮着,咬着,直逼得我们都快发了狂.
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