That it was like the Earth’s was confirmed in 2008 on one of Messenger’s fly-bys.
水星磁场同地球的磁场一样，这在2008年信使号的一次近水星飞行中被证实了。
Such fly-bys give spacecraft a whip-crack of extra speed【3】 on their tour through the solar system.
在太阳系中漫游的宇宙飞船当其靠近地球作低空飞越时，会加上一个额外速度。
This field was discovered by Mariner 10. That it was like the Earth's was confirmed in 2008 on one of Messenger's fly-bys.
就如同2008年在信使号的一次飞经中确认了地球的磁场，水手10号也就那样发现了水星的这个磁场。
Mariner 10 managed to map about 45% of Mercury's surface as it sped past, but Messenger's three fly-bys have filled in the gaps, and there is now a virtually complete map of the place.
过去水手10号已绘出了45%的水星表面，而信使号的3次飞经填补了余下的空缺，如今已能呈现出一张如实完整的地图。
Without its six fly-bys—which used the gravitational fields of the planets involved to counter that effect—Messenger could not have slowed sufficiently to allow it to drop into its intended orbit.
没有这六次“飞经”（利用各行星重力场的作用），就没办法使信使号降到能滑进水星轨道的速度。
Without its six fly-bys—which used the gravitational fields of the planets involved to counter that effect—Messenger could not have slowed sufficiently to allow it to drop into its intended orbit.
没有这六次“飞经”（利用各行星重力场的作用），就没办法使信使号降到能滑进水星轨道的速度。
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