投入使用: 1. go into service2. come into play3. brought into operation4. bring...into operation5. come into service. Examples:机器一旦经过试验,就可以投入使用。Once the machines are tested, they may be put into service. 投入使用或服务于To put to use or service.更多公共汽车将投入使用。More buses are to be put into service.未使用的没有处在使用之中的或未投入使用的