Remember in the ion, we're going to have less electrons around to counteract the pull from the nucleus.

还记得在这个离子中，在原子核周围,抵消它吸引力的电子更少。

麻省理工公开课 - 化学原理课程节选

Launched in September 2011, the spacecraft were designed to map tiny variations in the pull of gravity around the lunar body.

BBC: Nasa reveals new information about moon probes crash sites

He has had to cope with a relegation fight, a seemingly divided squad, injuries to his main signings and a welter of off-field problems to pull the Hammers around and keep them in the Premiership.

BBC: Tevez delivers final twist

The Texas car chase started when a sheriff's deputy in Montague County, James Boyd, tried to pull over the Cadillac around 11 a.m.

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