Canned varieties of beans and pulses are a good standby.各种豆类罐头制品是很好的常备食品。electrical pulses zinging down a wire迅速通过电线的电脉冲A string of electrical pulses is often shown as this.一列电脉冲经常表示成这样....
After purging , oxygen pulses are injected until the detection system no longer indicates oxygen adsorption.脱氧后, 注射氧脉冲直到测检系统表明不再有氧吸附为止.Still another system is designed to send out transient pulses intermittently.还设计了另一种系...