Bees have a built-in system a bit like GPS and this helps them find their way back to their hives.
蜜蜂体内有一种类似于全球定位系统的系统，这帮助它们找到返回蜂巢的路。
"It works a bit like an aerosol," says Professor Steve Field, chair of the Royal College of GPs. "When someone sneezes, droplets fly from the nose and mouth."
“它的作用有点像喷雾，”皇家学院教授史蒂夫·菲尔德说“当某人打喷嚏的时候，液滴从鼻和口飞出。”
There are some other GPS antenna technologies (chip, helical), but they are not as common, a bit more expensive, and require significantly more amplification and filtering.
还有一些其他的GPS天线技术(芯片，螺旋)，但它们并不常见，有点贵，需要大大增加放大和过滤。
Under weak signal environments, bit synchronization is very important and difficult in GPS receiver design.
弱信号下的比特同步在GPS的接收机设计中是一个重点也是一个难点。
Though we had a pocket GPS, it's still a little bit scaring to drive in those busy and strange streets.
虽然我们有一个袖珍“卫星定位路导”，在繁忙陌生的街道上开车还是有点儿吓人。
Though we had a pocket GPS, it's still a little bit scaring to drive in those busy and strange streets.
虽然我们有一个袖珍“卫星定位路导”，在繁忙陌生的街道上开车还是有点儿吓人。
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