当他警惕时，允许尾巴向上卷，但决不允许尾巴翻卷或上翘到背部以上。
An upward swirl is permissible when the dog is alert, but the tail may never curl or be carried over the back.
大的流星尾巴可被肉眼看见，但最经常出现的是那些亮度相当于15等星以上的小尾：这些小尾成了雷达探测的目标。
The larger trails can be seen with the naked eye, but even the smaller meteors down to 15th magnitude, which are more common, the left trails that provide radar targets.
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