在中国民间传说中，蝙蝠是好运的象征。
我一看到那只蝙蝠就把门闩上了。
蝙蝠加入了鸟群。
他赶走了蝙蝠。
它们不是蝙蝠耳。
这有一只胖蝙蝠！
哦，天哪，我要像蝙蝠一样瞎了。
根据它的体型，像大耳蝠这样的蝙蝠可以活4年。
Based on its body size, a bat-like the greater mouse-eared bat would be expected to live four years.
为什么布鲁斯·韦恩要花数百万美元打扮成蝙蝠的样子？
上周，这组科学家表示，他们在一些蝙蝠物种中发现了重要的生物特性。
Last week, the group of scientists said they had found important biological qualities in some bat species.
在绿树成荫的郊区，街灯周围经常有乍一看像是飞蛾的东西，事实上可能是一只小蝙蝠。
Around streetlights in leafy suburbs, what often seems like a moth at first glance may, in fact, be a small bat.
例如，他们很快就能识别出与飞蛾有关的回声，飞蛾是蝙蝠的常见猎物，尤其是扑打翅膀的飞蛾。
For example, one echo they quickly identify is the one they associate with a moth, which is common prey for a bat, particularly a moth beating its wings.
蝙蝠头部朝上。
蝙蝠通过一种回声定位来判断距离。
蝙蝠用一种回声测定法来判断距离。
俗语“像蝙蝠一样瞎”根本就是不对的。
许多热带雨林的蝙蝠特别适合这种生活方式。
The many rainforest bat species are especially well adapted for this lifestyle.
蝙蝠“雷达”这个用语在技术上是错误的，因为它们不使用无线电波。
It is technically incorrect to talk about bat "radar", since they do not use radio waves.
所以蝙蝠发出这些脉冲，一种非常集中的声波，然后回声就会反弹回来。
So the bat sends out these pulses, very focused bursts of sound, and echoes bounce back.
当它们停止拍打翅膀，蝙蝠就很难将它们与一片树叶或者其他什么东西区分开。
When they stop beating their wings, they'd be much harder for the bat to distinguish from a leaf or some other object.
在这个传递和反射的过程中，声音发生了变化，回声的变化使蝙蝠能够感知到目标的特征。
In this process of transmission and reflection, the sounds are changed, and the changes in the echoes enable the bat to perceive features of the target.
总之，就像我刚才讲的，通过分析这些回声，蝙蝠可以确定，比如说，洞穴里是否有需要避开的墙壁，以及它的距离有多远。
Anyway, as I were saying, by analyzing these echoes, the bat can determine, say, if there is wall in a cave that it needs to avoid, and how far away it is.
小子，抓住那只蝙蝠！
欧洲的研究人员研究了源于四个物种的493只蝙蝠。
The European researchers studied 493 bats from four bat species.
我想画一朵小花、一只蜘蛛、一只黑猫、一只蝙蝠、一个南瓜、一个鬼、一个巫婆。
I want a flower, a spider, a black cat, a bat, a pumpkin, a ghost or a witch.
事实上，所有1100种蝙蝠都能看见东西，而且视力往往相当好，只是不如其他夜间狩猎动物那样出色罢了。
The truth is that all 1,100 bat species can see and often their vision is pretty good, although not as excellent as other night-hunting animals.
洞穴蝙蝠通常生活在坚硬的石头天花板上，它比习惯降落在枝叶繁茂的树梢上的蝙蝠要更小心地做好着陆准备。
A cave bat, which regularly lives on a hard stone ceiling, is more careful about its landing preparation than a bat more accustomed to landing in leafy treetops.
蝙蝠会发出我们听不到的非常高的超声波脉冲。
The bat emits these ultrasonic pulses, very high pitch sound waves that we cannot hear.
因为它们的频宽很窄，CF信号只能描绘目标的存在，而对于一些种类的蝙蝠来说，CF 信号还能描述目标相对于蝙蝠的运动。
Because of their narrow bandwidth, CF signals portray only the target's presence and, in the case of some bat species, its motion relative to the bat's.
它们可以探测到超声波；这意味着当蝙蝠靠近，飞蛾可以察觉到它的存在。
They can detect ultrasound; this means that when a bat approaches, the moth can detect the bat's presence.
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