查询词典 fifteen

Thirty-seven percent of the femora demonstrated stress-transfer bone remodeling at fifteen years.

其中37％在15年后出现压力传导骨的改建。

Fifteen per cent of all people who have had strokes have atrial fibrillation.

％的所有的人，已招有心房颤动。

Norman Uphoff learned about it fifteen years ago while working there, he led a field trial s for the systems for three years.

诺慢阿福在15年前听说了他当他在那里工作的时候，他以这个系统为一次农田试验持续了三年。

When I was your age, I was fifteen.

当我在你那么大时，我15岁了。

So I'll have to leave in fifteen minutes.

所以我要在15分钟内离开。

How old are you? I'm fifteen.

你多大了？我15岁。

I'm fifteen years old, but it's time to think about this!

我15岁了，该想想这个问题了。

He can't be only fifteen.

他不可能只有15岁。

You can't be fifteen this year.

你今年不可能是15岁。

Our products are exported to more than fifteen countries.

我们的产品出口到了十五多个国家。

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。