查询词典 playground

He didn't want to be at the playground anymore.

他再也不想在操场上玩了。

I'm on the playground.

我在操场上。

I'm on the playground, too!

我也在操场上！

In the front of the school, there is a playground.

在前面的学校，有一个操场。

Would you like to go to the playground?

你愿意到操场上去吗？

What do you see on the playground?

在操场上你看到了什么？

And in the school on the playground.

还有在学校和操场的时候。

What do you do in the playground?

你们在操场在做什么？

There are a lot of people on the playground.

操场上有许多人。

I saw him playing on the playground.

我看到他在操场上玩。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。