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- DUC and DDC 数字上变频和下变频
- The communication interface circuit (BMC and DDC layer, DDC and MCM layer) was also discussed. 通讯和逻辑电路:BMC层与DDC层通讯和接口电路及DDC层与MCM层的通讯接口电路。
- The operation of the real system shows that the control system with PLC and DDC has complied with the design. 通过实际运行证明,PLC和DDC协调控制系统性能可靠,完全达到了设计规定的指标和要求。
- The relationship between PSS and DDC is studied, and it is proved that PSS is a special type of DDC, so it is shown in theory that DDC is more ascendant than PSS. 分析了PSS与DDC的关系，论证了PSS是DDC的一种特殊形式，因而从理论上说明了DDC比PSS优越。
- Based on the investigation for EMCS's worldwide applications and the analysis of practice in Shenzhen Underground, the comparison and selection of PLC and DDC have been done completely. 并对国内外该系统的使用情况,结合深圳地铁实际的分析,对系统的可编程控制器PLC和数字直接控制器DDC进行了全面的比选。
- I hit him fair and square on the jaw. 我不偏不倚打中他的下巴。
- It is a fact of life and you must face it. 这是严酷的现实，你必须面对它。
- She and I can't live under the same roof. 她和我不能住在一起。
- She had to scrimp and save to pay for her holiday. 她不得不为付假期的费用而苦苦攒钱。
- I'll try and rustle you up something to eat. 我设法给你弄点吃的。
- He sprang up and rushed to the door. 他跳起身，跑到门口。
- He took sick and died a week later. 他得了病，一周后就死去了。
- He's been in and out of prison for years. 他多年来屡次进出监狱。
- The air in the garden was warm and fragrant. 花园里的空气一片温馨。
- The child was tired and fretful. 那孩子又疲倦又烦躁不安。
- Routine office work is my bread and butter. 日常的办公室工作是我的谋生之道。
- Language teaching is both a science and art. 语文教学既是一门科学又是一种艺术。
- The old man stared the uninvited guest up and down. 老人把不速之客上下打量了一番。
- Elevator Supervision System By PLC and DDC 基于PLC与DDC的电梯监控系统
