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经济人 Science and technology

1.By " listening" to sound waves from the Sun, " helioseismology" has since allowed astronomers to work out the structure and dynamics of the star's interior.

通过“聆”太阳的声波，“日震”让天文家能够恒星内部的结构和动力。机翻

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at this time of year, at times, at variance, at war, at weekends, at will, at work, AT&T, at.no., at.wt.,

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