查询词典 direct

A mild and highly efficient ZnCl2-catalyzed direct alkylation of active methylene compounds with benzylic and allylic alcohols has been reported.

报道了ZnCl2催化的活泼亚甲基化合物和苄醇或烯丙醇的直接烷基化反应。

If you are a member of Tacoma Territory you can still import the original complete kit direct from Alpine.

如果你是一名塔科马的成员领土你仍然能从直接进口这套原先的完整的工具高山。

It is possible to convert alternating current to direct current.

把交流电转化成直流电是可能的。

In alternating current the motion of the charges is periodically reversed; in direct current it is not.

在交流电中，电荷流动会定时的反向，而在直流电中则不会。

The resistance of a conductor is not constant for alternating current as it is for direct current.

导体的电阻对于交流电来说并不像它对于直流电那样是恒定的。

An electronic device which converts alternating current to direct current.

一种将交流电转换成直流电的电子设备。

The usual way to do this would be to use a rectifier—a device that converts alternating to direct current.

完成这步常用的方法是使用整流器—一种把交流电转换成直流电的器件。

A device used to convert direct current into alternating current .

它表达了流动资产与流动负债之间的关系。

"A rectifier converts the power from alternating to direct form, a regulator ensures that the output voltage is properly matched to the battery voltage as engine speed varies."

整流器把电力从交流变为直流形式，调节器在引擎转速不同时确保输出电压与电池电压配合妥当。

The company's products--- RFM-S intermediate frequency, high frequency, ultrasonic frequency series and the alternating and direct filter capacitor, receive high praise after the customer use them, and we also receive a consistent approval product quality.

公司所生产的RFM-S中频、高频、超音频系列及交、直流滤波电容器，在客户使用后颇受好评，产品质量得到一致认可。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。