unit two robots
word usage
1. experiment vi. 1) make an experiment
2) test or trial done carefully
some people learn by experiment and others learn by experience.
he is experimenting with drugs to cure hepatitis.
have they ever experimented on a large number of patients?
2. absent adj. 1) not present
2) take no notice of sth
three members of the class were absent this morning.
snow is absent in his country.
he had an absent look on his face.
3. embarrass v. cause sb to feel self-conscious; awkward or shamed
arthur seemed embarrassed by the question.
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