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The study concludes that the future of replacing oil and gas lies with cellulosic ethanol produced from low-cost materials like switch grass or wheat straw, if it is grown on agriculturally marginal land or from waste plant material.

该研究认为，用柳枝草或麦杆等低成本原料（如果种植于边缘农田或来自植物废料）生产的纤维素乙醇将是未来替代石油和天然气的希望所在。

Today, we switch to epoxy to cast the piston. We had cast the model yesterday.

今天我们改用树脂做活塞，昨天已经浇铸了模型！

Taking the high-voltage switch with the ZL101A cast ing smelting technology as the example,on the one time smelting technology of the Al-Si alloy in the cast ing is studied in this paper and producing scene,and the technology process is introduced in detailed.

以高压开关用ZL101A铸件的熔炼工艺为例，对ZL101A在铸造生产现场的1次熔炼工艺进行了研究，并介绍了具体的工艺措施。

First die cast switch frame.

第一个压铸件开关架成形。

First use of cast iron switch frame at Hazelton, Pennsylvania.

宾夕法尼亚州Hazelton首次使用铸铁开关架。

The MEMS switch consists of a set of quasi-finite ground coplanar waveguide transmission lines and a right and left swing cantilever beam.

横向金属接触开关包括了一套有限的共面波导传输线和左右摆动的悬臂梁。

The braking process is actuated by the surface at the switch ring and the sensor which scans this surface.

这个制动的过程是由切换环的水平面和扫描表面的传感器来启动的。

The braking process is actuated by the surface at the switch ring and the sensor which scans this surface.

这个制动过程是由切换环的表面和扫描此表面的传感器来启动的。

In this paper, a new ceramic surface flashover trigger of pseudospark switch is presented for the first time.

设计了伪火花开关的陶瓷材料表面放电触发器，该触发器体积小，结构简单，可焙烧。

Finally,the paper puts forward the prospect of laser-triggered surface flashover switch.

最后，指出对窄脉冲电压下的激光沿面闪络开关，激光脉冲与电压脉冲的同步是一个很关键的问题，有待深入研究。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。