Such ice cores trap gases, bits of dust, and other chemicals that were present in the snow that fell over Greenland for thousands of years and then became compressed into ice.
这些冰芯将气体、尘埃和其他化学物质封存在格陵兰岛数千年来的积雪中，然后被压缩成冰。
Not only did the two small speakers that sit above and below the screen become an instant dust-trap, they were fairly quiet and didn't exactly impress on the audio quality front.
不单单是那两个在屏幕上下的扬声器很快会变成尘土陷阱，它们完全“安静”，同时不能准确地表现音频质量。
The dust he kicked up reinforced the idea that the moon is one big sand trap.
这也使人们进一步确信月球是一个巨大的沙坑。
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