He was already buffing the car's hubs.他已经在擦汽车轮毂了。I greased front and rear hubs and adjusted the brakes.我在前后轮毂上都抹了润滑油，还调校了刹车。Shafts and hubs are usually fastened together by means of keys.轴和轮毂通常用键固定在一起....
This form of civil disobedience isn't a particularly new phenomenon.这种形式的非暴力反抗并不是特别新的现象。Civil disobedience, violent or non-violent, is intentional law breaking.公民抗命，不管是暴力还是非暴力的，都是故意犯法。Father slapped the boy on the f...
Contamination - proof is an absolute necessity in the maintenance of fluidic devices.防止污染对保养射流装置是绝对必要的.Then the difference between fluidic light discharge theory and Townsend discharge theory is also described.同时阐述了流光放电理...