"operative regulations" "the major tendencies operative in the American political system"
"a surgical appendix" "a surgical procedure" "operative dentistry"
"the operative word"
"in running (or working) order" "a functional set of brakes"
operative是什么意思
operatize是什么意思
operculiform是什么意思
operculum是什么意思
operetta是什么意思
operette是什么意思
opern是什么意思
operon是什么意思
operose是什么意思
ophicleide是什么意思