The bat emits these ultrasonic pulses, very high pitch sound waves that we cannot hear.
蝙蝠会发出我们听不到的非常高的超声波脉冲。
So the bat sends out these pulses, very focused bursts of sound, and echoes bounce back.
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。
This perspective makes sense if you simplify the workings of a complex brain, reducing it to an array of electrical pulses.
如果把复杂大脑的运作机制简化为一系列电脉冲，那么这种观点就讲得通了。
Then, about 7000 B.C., within the space of a few generations, they switched abruptly to herding domesticated goats and sheep and to growing einkorn, pulses, and other cereal grasses.
后来，大约在公元前7000年，在几代人的时间里，他们突然转向放牧家养的山羊和绵羊，转而种植单粒小麦、豆类和其他谷类牧草。
By and by their pulses slowed down, and Tom whispered, "Huckleberry, what do you reckon'll come of this?"
过了一会儿，他们的脉搏平缓了下来，汤姆低声说：“哈克贝利，你想这事结果会怎么样？”
They both felt their pulses beat faster.
他们都觉得脉搏跳得更快了。
The ideal diet would consist of cereals and pulses.
理想的食谱是谷类和豆类食品。
All living cells send out tiny pulses of electricity.
每个活细胞都会发出微小的电脉冲。
Then they run pulses of current through the wire.
然后，研究人员往电线上通过一阵阵电流。
In would come vegetables and pulses, together with yoghurt.
该多吃的是蔬菜和豆类，另外加上酸奶。
But that doesn't seem to get the pulses racing in Finland.
但这个主意似乎并不能打动芬兰人。
The enhancements allow for sending and receiving short C2CK pulses.
这些改进允许发送和接收短的C2CK脉冲。
In the actual experiment, there were no leading and trailing pulses.
在实际的试验中不存在主导脉冲与后缘脉冲。
She uses these pulses to determine how to polarise the photons she sends back.
她利用这些脉冲检查她送回的光量子是如何极化的。
The shorter the laser pulses, the broader the range of frequencies in the comb.
激光脉冲越短，频率梳的频率范围越宽。
The tags send out pulses of sound which can be picked up by undersea receivers.
电子标签发射出可被海底接收器识别的声波。
Dolphins are known to make three types of sounds: whistles, clicks and burst pulses.
大家知道海豚可以制造三种声音：哨声、咔嚓声和促发脉冲声。
It is designed to detect the low-frequency radio pulses emitted by lightning strikes.
这一系统旨在感应雷击产生的低频射电脉冲。
The researchers then sent light pulses directly into the brains of mice while they slept.
当老鼠睡着后研究人员将光脉冲直接注入老鼠大脑。
The timing between pulses determines the spacing between the teeth of the frequency comb.
脉冲的定时间隔决定了频率梳的齿间距。
The machine sends pulses of antiprotons about every hundred seconds into cold helium gas.
机器每隔约100秒发送1个反质子脉冲进入到冷的氦气中。
There is a follow up chapter on dynamic effects, like fades, pulses, springs and morphs.
随后的一章讲述了动态特效，比如淡入淡出、脉动、弹簧和变形。
But when people have enough calories they need to diversify towards vegetables, pulses and meat.
但是，当人们卡路里摄入充足时，则需要有蔬菜、豆类和肉类等多样化的饮食。
Nor are aircraft the only vehicles from which destructive electromagnetic pulses can be launched.
飞行器亦非唯一可发射破坏性电磁脉冲的运载工具。
Applying needles at pressure points is thought to trigger electrical pulses that suppress appetite.
将细针扎在压力穴可以诱发抑制食欲的神经电脉冲。
For example, spinning neutron stars called pulsars emit clocklike streams of electromagnetic pulses.
例如，被称为脉冲星的自旋中子星发射出像钟摆一样的电磁脉冲。
Within these pulses are a number of discrete colours of light in what is known as a "frequency comb".
伴随这些脉冲的是很多离散光，被称为“频率梳”。
To start the key exchange, Bob sends Alice two strong laser pulses separated by a precise interval.
开始密匙交换时，鲍勃要给爱丽丝发射两道强激光信号，之间的间隔是经过精密设定的。
Iron is commonly found in meat, but vegetarians can source iron from pulses and leafy green vegetables.
铁通常含于肉中，但素食者可从豆类和叶类植物中获取。
Tinned tomatoes are up by 30% over the period, tinned beans by 42% and rice, grains and pulses by 55%.
听装番茄几年间涨了30%，听装豆子涨了42%，大米，谷物和干豆涨了55%。
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