"set aside a certain sum each week"; " to a certain degree"; " certain breeds do not make good pets"; " certain members have not paid their dues"; " a certain popular teacher"; " a certain Mrs. Jones"
"felt certain of success"; " was sure (or certain) she had seen it"
同义词： sure
"what is certain is that every effect must have a cause"; " it is certain that they were on the bus"; " his fate is certain"; " the date for the invasion is certain"
"he was certain to fail"; " his fate is certain"; " In this life nothing is certain but death and taxes"; " he faced certain death"
同义词： sure
同义词： sealed
"a quick and certain remedy"
同义词： sure
"be certain to disconnect the iron when you are through"
同义词： sure