The radial axis (R-R) traverses a radial line (x) that radially extends from a common axis of rotation (A-A) of the tire (12) and the wheel (14).

所述径向轴(R - R)横过从所述轮胎(12)和车轮(14)的共同的旋转轴(A - A)上径向伸出的径向线(X)。

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The axes of the reflecting surfaces of the two parabola reflectors are overlapped at a common axis, and the focuses of the reflecting surfaces are overlapped at a common focus.

该两个 抛物线反射镜反射面的轴线重合于公共轴线处，且各反射面焦点重合 于公共焦点处。

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You can bookmark any page and get at it later through a common portal -- hence the Axis name.

ENGADGET: Yahoo Axis on desktop, iOS unifies your bookmarks, makes the web visual (hands-on)

Another common reply is (3) climb atop the blades and position your center of gravity over the axis.

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