This widely recognized and highly abstract X - bar schema is commonly known as the X - bar theory.

这种得到广泛认可、高度初象化的 X 标杆表达法通称为 X 标杆理论.

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The classic theory may be divided into Vorousov section and Wumanski closed section thin - walled bar theory.

经典理论主要可分为符拉索夫开口薄壁理论与乌曼斯基闭口薄壁杆件约束扭转理论.

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