大多数黑洞通常有较长的安静之后，偶尔爆发的战机和其他活动，因此地球观测卫星1915年是不寻常在这方面。
Most black holes ordinarily have long periods of quiet followed by occasional outbursts of jets and other activity, and so GRS 1915 is not unusual in that respect.
大多数黑洞通常有较长的安静之后，偶尔爆发的战机和其他活动，因此地球观测卫星1915年是不寻常在这方面。
Most black holes ordinarily have long periods of quiet followed by occasional outbursts of jets and other activity, and so GRS 1915 is not unusual in that respect.
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