activatorKK [ˋæktəˏvetɚ] /ˈæktəˌveɪtɚ/发音名词1活化剂、催化剂化学、生物The enzyme stays inactive until an activator binds to it.这种酵素在活化剂与它结合之前都不会产生作用。2启动器、启动装置Press the activator on the handle to start the motor.按下握把上的启动器就能发动马达。用这个字练口说→