2. the act of testing something
同义词河北中考语文作文范文app小学：trial, run
3. the act of undergoing testing
同义词：trial
4. trying something to find out about it
同义词：trial, trial run, tryout
5. a set of questions or exercises evaluating skill or knowledge
同义词：examination, exam
6. a hard outer covering as of some amoebas and sea urchins
动词test:
1. put to the test, as for its quality, or give experimental use to
同义词：prove, try, try out, examine, essay
2. test or examine for the presence of disease or infection
同义词：screen
3. examine someone's knowledge of something
同义词：quiz
4. show a certain characteristic when tested
5. achieve a certain score or rating on a test
6. determine the presence or properties of (a substance)