In 1991, theoretical physicist John Sidles first proposed the idea of combining MRI with atomic force microscopy to image tiny biological structures.

1991年，理论物理学家约翰·赛德斯首次提出了将原子力显微技术与MRI相结合用以对微小生物结构成像的想法。

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The debris will continue to spread, however, and potentially could force the station to make an avoidance maneuver at some point, said NASA spokesman John Yembrick.

美国宇航局发言人约翰•耶姆布雷克表示，但是，碎片会继续扩散，有可能迫使空间站在某种情况下采取避撞操作。

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Starting in 1954, Colonel John Stapp of the U.S. Air force endured grueling tests that subjected his body to forces 35 times that of gravity, including one record-setting run of 632 miles per hour.

自1954年开始，美国空军上校约翰·斯·塔普大约经历了35倍的重力的试验，并创下一项每小时运行1000多公里的记录。

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With his force of less than twenty men, John Brown moved through the darkness down to the bridge that crossed the Potomac River.

VOA: special.2009.06.25

Commander John Harbour is at the European Union's Naval Force Maritime Security Center.

VOA: standard.2010.04.20

His name was John Force.

WSJ: New Jersey's Noisiest Neighbor

Another parallel which I put to the secretary of state at her news conference this morning is with John Gummer force feeding his daughter with beef burgers while insisting that British beef was safe.

BBC: Thursday 19 September

The goal is to force John McCain to defend his turf.

CNN: Obama bets big with 50-State Strategy