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5hamstring stretch (back of thighs).

腘绳肌(大腿后部肌群)拉伸练习。

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Yet the histories of both firms stretch back into the 19th century, to when they dispatched young men on ships from Liverpool and Rotterdam to faraway places.

两家公司的历史都可以追溯道19世纪，他们派遣年轻人从利物浦和鹿特丹出发到很远的地方去。

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"And like the broader American citizenry, the American Muslim community is one of extraordinary dynamism and diversity - with families that stretch back generations and more recent immigrants;

VOA: standard.2009.09.02

However, America's ties to this city -- and to this country -- stretch back further, to the earliest days of America's independence.

WHITEHOUSE: President Obama Holds Town Hall with Chinese Youth

By taking a piece of the sural nerve--a long, straight stretch of nerve that runs alongside the back of the calf and ankle--and stitching it into the pelvis between the severed cavernosal nerves, surgeons say they are able to preserve erectile function in patients who have had one or both nerves severed.

FORBES: Magazine Article

But Duke had serious trouble stopping the Terps, who scored on 12 of 17 trips downcourt and used an 18-6 run to stretch the lead back out to 13.

NPR: Wells Leads Maryland To 83-74 Upset Of No. 2 Duke