短语chasing your tail的意思就是从早到晚忙个不停，但没有太多收获，就是我们常说的瞎忙活或无谓瞎忙。
　　例句：
　　I've been chasing my tail all day, but I haven't got anything done! What a waste of a day!
　　Organising a meeting for next week has been impossible. I've been chasing my tail trying to sort out a date, venue and agenda... I'll try again tomorrow!
　　类似表达：
　　短语to run around like a headless chicken的意思是投入大量精力去做很多事情，但是没有任何真正的收益，如汉语里常说的“像无头苍蝇到处乱撞”。
　　例句：
　　I've been running around like a headless chicken all day trying to get ready for my holiday, but it's already 7.30pm and I've still got loads to do!
　　A southern right whale's head measures one third of its total length. It is easy to identify, as the enormous head is covered in white-coloured outgrowths of tough skin. They are only found in the oceans of the southern hemisphere.
　　一条南露脊鲸的头部长为其整个身体的三分之一。这类鲸鱼非常容易识别，因为巨大的头部被一堆白色的硬糙皮覆盖。人们只能在南半球的海洋里看到南露脊鲸。

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