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- The first stage is push pull forward converter, and the second stage is a dual buck inverter(DBI). 该静止变流器前级采用推挽正激式变换器,后级采用双降压式逆变器。
- A high frequency link Push Pull Forward(PPF) type inverter is proposed in this paper,which have the advantages of the Push-Pull DC converter and the high pulse DC link inverter. 本文结合推挽正激直流变换器和高频脉冲直流环节逆变器的优点,提出了一种适用于低压大电流输入场合的推挽正激式高频环节逆变器。
- From the dead tree, Kevin uncurled the guide rope, anchored the other end to his van and pulled forward to tighten it. 凯文把拴在死树上的导索展开，将其另一端固定在他的货车上并向前牵引拉紧。
- Apart from some principals and major issues in use of GSP, it pulls forward creative requirements for the use of GSP and the reform of New Curriculum. 提出了用几何画板创设数学情境的原则及注意的问题。最后对数学教师面对新课程改革利用几何画板创设情境提出了新的要求。
- Auto production has also probably bottomed out, with cash-for-clunkers eliminating excess inventories, though the scheme pulled forward demand, making this harder to read. 汽车产量很可能也已经触底，“旧车换现金”计划消除了过剩库存，尽管该计划鼓励人们超前消费，使这方面的形势较难解读。
- If we can pull through this recession, we will be in good shape. 如果我们能渡过这段经济不景气的时间，我们就会好多了。
- Plans have been put forward to pull down and rebuild the area. 已提出计划，要把这个地区的房屋推掉重建。
- Joe tried to pull the heavy cart, but to no avail. 乔想拉那部笨重的大车，但是拉不动。
- The newspaper owner failed to pull the paper round. 报馆老板没能挽救该报的失败。
- Pull up these plants by the roots. 将这些植物连根拔起。
- He will pull through his illness soon. 他很快就会恢复健康的。
- A pull on the rope will make the bell ring. 一拉绳子钟就响。
- My foot caught in a creeper and I pitched forward. 藤蔓缠住我的脚，使我向前倒下。
- The tides depend on the pull of the moon. 潮汐是月亮引力作用的结果。
- He gave a quick pull on the rope. 他很快地拉了一下绳子。
- Einstein put forward his new theory of relativity. 爱因斯坦提出了相对论的新学说。
- It was a long pull to the shore. 费了半天劲才划到岸边。
- We look forward to the return of spring. 我们期待着春天的到来。
- I told the driver to pull up, and I got out. 我告诉司机停一下，然后我下了车。
- Many activists have come forward. 涌现了大批积极分子。
