慢速英语:Motor-Free Device Reduces Stress from Walking
日期:2015-04-16
Words in this Story
boost – n. help or encouragement; a push upward
exoskeleton – n. an artificial external supporting structure
restore – v. to give back someone or something that was lost or taken : to return someone or something
spring – n. a twisted or coiled piece of metal that returns to its original shape when it is pressed down or stretched
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