慢速英语:NASA Successfully Tests New Rocket Engine(翻译)
日期:2016-07-03
Words in This Story
booster – n. part of a rocket that includes an engine
uncrewed – adj. (technical) without a crew
thrust – n. the force to pushes something forward or up
conduct – v. to carry out a test
data – n. basic information about an event or from some process
certify – v. to officially say that something has met requirements for use in some field
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