查询词典 many a time

After a period of time has been beset by years of many symptoms I had not been repeated.

一段时间之后，困扰了我多年的很多病症居然就没再犯过。

along with the development of digital technology,digital filters are widely used in many fields,this paper introduces how to design a iir digital notch filters in matlab environment.the design of digital notch filters can be achieved through three steps:firstly,the design of analog lowpass filter; secondly,it is analog lowpass to analog band stop filter conversion;at last,using the bilinear transformation make the analog notch filters change into digital notch filters.the paper also introduces how to design the transfer function of the digital notch filters using all the zeros and farthest points at the same time,it also introduces the program of the digital notch filters under butterworth analog lowpass prototype.

摘 要：随着数字技术的发展，数字滤波器在许多领域得到广泛的应用。研究一种在matlab语言环境下设计iir数字陷波滤波器的方法，在数字陷波滤波器设计过程中，先进行模拟低通滤波器的设计，然后进行模拟低通/模拟带阻滤波器转换，最后采用双线性变化法将模拟陷波滤波器转化成数字陷波滤波器。提出一种用所有零点和极点来表达数字陷波器传递函数的方法，同时给出以巴特沃斯模拟低通为原型设计数字陷波滤波器的程序。关键词：无限冲激响应；巴特沃斯滤波器；数字陷波滤波器；matlab；双线性变换

Before the snooker ball is produced , billiard ball game has existed for a long time, and there are many kinds of playing methods.

在斯诺克球产生之前，台球游戏早就存在，而且有多种玩法。

Most of the time a biome is many different ecosystems put together.

在大多数情况下，生物群落是不同生态环境的综合。

In stage publicly admitted in o homosexuality, bizet said:"playing games will seriously, and the question asked me for many years, that is, every time want to give you a fresh!"

对于在台上公开承认同性恋，阿诗在台下表示："玩游戏都要认真对待，而这个问题问了我好多年，每次都是那样答，这次想给大家新鲜感罢了！"

Teams - Each child, with parent assistance, will be given a set time to blow as many bubbles as they can.

分四组——在家长的帮助下，规定时间内吹出尽可能多的泡泡。

I was thinking of backing up my bookmarks for a long time as tooo many are there .

我想备份我的书签了很长一段时间作为tooo许多有。

We shall see the Games. We shall visit many parts of the country.(not only...but...)1 Both my brother and I are going to the Olympic Games."both...and..."作复数看2 We bought tickets a long time ago and shall be leaving soon.

搜狐白社会推荐：活动：偷菜不如盖楼，玩游戏就能挣50万元| 2010年种菜偷菜不如盖房收租|比偷菜还好玩的钓鱼游戏|测试：你这辈子有富贵命吗？

Frequently occurring in mountain valley or sloping field, debris flow is one kind of solid-liquid two-phase flow which containing a mass of sand block and bowlder. It has many characteristics such as breaking out abruptly, time brevity, vigor ferocity, and fast calamity etc.

泥石流是产生于山地沟谷中或坡地上的饱含大量泥沙石块和巨砾的固液两相流体，具有暴发突然、历时短暂、来势凶猛、成灾快速等特点，是现阶段最活跃的地表动力地貌过程之一。

For many Britons accustomed to watching Thatcher browbeat enemies and dress down aide s, it seemed like only a matter of time before her support for Major would cool.

对很多看惯撒切尔向她的政敌怒目而视或斥责僚属的英国人来说，她对梅杰的支持迟早都会冷却。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。