1·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。
2·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。
3·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。
4·Vegans benefit from ng, baked goods and a wider variety of grains and pulses; what's more, cooking AIDS the absorption of some micronutrients.
素食者从强化谷物、烘焙商品和多种多样的谷类豆类中收益；还有烹调有助一些微量营养素的吸收。
5·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。
1·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。
2·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。
3·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。
4·If just one of the pulses - or neither of them - resonates with the strip then it remains in its existing vibrational state.
如果只有一种脉冲——两种的其中一种——与硅条产生共振，硅条只能停留于振动的状态。
5·They work by sending out pulses of high-frequency sound and then interpreting the reflections as images.To do all this, though, you need a device called a transducer.
它们的工作原理是通过发出高频声波脉冲并将反馈的信息转变成图像，为了实现这一过程，你还需要一个叫做变频器的设备。