In addition, the shaft not only can rotate, but also can slide axially when matched with an inner race. In this way, the scope of application is further enlarged.

另外，轴与内圈配合后不仅可转动，还可轴向滑动，适用范围进一步扩大。

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Both, it turns out, when human-powered sculptures cross sea, mud, and sand in an eight-hour, 15-mile race along the city's Inner Harbor each May.

都是。每年5月参赛者要沿着市内海湾大约15英里的距离，用人力打造的工具在8小时内穿越海洋，泥地和沙地。

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One concerned the future shape of the Union, and whether an inner core of countries could race ahead to ever-tighter integration, perhaps even presaging a federal superstate.

ECONOMIST: The many tricky ways of widening Europe | The

For many an attendee, the race is a time to channel her inner Southern belle, no matter her provenance.

WSJ: Hatmaker Polly Singer | 60 Seconds With