He has accustomed himself to front turn, but can not rear pivot.
他习惯于前转身，不会后转身。
The main pivot is so large that there's no lateral movement at all from the rear.
主要支点是如此之大，有没有横向运动，在所有从后方。
I think it's a single pivot system because the rear type will just move like a single pivot system.
我认为它是单转点系统是因为后部运动形式像单转点系统。
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