跑步去学校用英语怎么写

I was running when Tom arrived at school!!!

a为提高传统一体化活性污泥工艺处理效果，在原有工艺流程中增加了预曝气段，研究了反应时间对新工艺除污效果的影响及其作用机理。 In order to enhance the traditional integration active sludge craft processing effect, increased the preaeration section in the original technical process, studied the reaction time to eliminate the dirt effect to the new craft the influence and the action mechanism. [translate]

[例句]I consider activities such as jogging and weightlifting as unnatural

5.The infantry would use hit and run tactics to slow attacking forces.

同学，介词应该不用on，而用by，应该是I usually go to school by bike.如果你用动词的话应该是这样:I usually ride a bike to go to school.望采纳。