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dust band (表的)防塵圈。

dust bin

With infrequent visits , comet kiess can ' t build up a broad dust band , and only generates a narrow trail of debris each time 由于琪斯彗星很少光臨,它無法形成一條寬闊的塵埃帶,而每次只能產生一條狹窄的由碎片組成的彗尾。