这两颗恒星彼此紧密相连,总是同步旋转。

These two stars are closely bound and always co-rotate with each other.

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These two stars are closely bound and always co-rotate with each other.

co-rotate 是由前缀 co-(表示"共同、一起")和动词 rotate(旋转)组成的复合动词,意思是"共同旋转、同步旋转"。

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