speeds/spiːd/名词速度，速率a ten-speed bicycle十速自行车苯丙胺，安非他明（一种兴奋剂）She was on speed at the time.她当时服了安非他明。/spiːd/动词（使）快速移动；（使）快速前行；加速；促进He was caught speeding.他超速行驶被抓住了。想跟读，去练习
