三叶的

The preoperation diameter of ascending aorta was taken as baseline. Patients were divided according to its baseline aortic diameter into diameter0 mm group and diameter≥40 mm group, furthermore, the patients were also divided according to echocardiographic findings into bicuspid aortic valve group and tricuspid aortic valve group.

以术前升主动脉直径为基础值，按基础值的大小分为直径﹤40mm组和直径≥40mm组，并按主动脉瓣形态分为二叶主动脉瓣组和三叶主动脉瓣组。

It's said that if you can find a four-leaf clover , you will find your happiness.

据说如果你能找到一片四叶三叶草，你将会找到属于你的幸福。

These two things are what we will study in sectionⅢ. We call them GS and PS. In this section we will study the impact of the two and the relationship between them. Of course, there are some other ways to observe the problem. One of them is to consider the period and the distribution of eigenspace. These are what we will study in sectionⅡ.

这两方面也就是本文中第三章所讲的生成序列和扰动序列，这一章中我们主要研究了这两个因素对分数傅立叶变换算子的影响及它们之间的关系；当然还有另一种看问题的角度就是从算子的周期性和特征子空间的分布的角度，这就是第二章中所介绍的内容，在这里我们给出了两个三周期的分数傅立叶变换算子并比较了其特征性质。

I happened to bring my camera with me, so I started to take some pictures of my lucky four-leaf clover.

我碰巧带了相机出来，所以，我就开始给我的幸运四叶三叶草照相，想要留个纪念。

In 1620, Sir John Melton wrote: If a man walking in the fields find any four-leaved grass, he shall in a small while after find some good thing.

1620年，John Melton先生写到：如果有人找到四叶三叶草，那么他会在不久的时期内交上好运。

I don't know if a 4- leafed clover helped him to "feel" any better, but it was the best I could manage.

我不知道如果一个四-叶三叶草帮他"感觉"更好，但它是最好的我可以管理。

In the aspect of the study of the application of HHT method, This dissertation has done three part of jobs: first, the Elcentro strong ground motion which is in common use in earhtquake engineering is analyzed by HHT method, getting its amplitude-frequency-time distribution and the comparison between the HHT marginal spectrum and Fourier spectrum is also made; second, the typical nonlinear system defined by the Duffing equation is analyzed by HHT method, getting its numerical value's amplitude-frequency-time distribution and the comparison between the HHT marginal spectrum and Fourier spectrum is also made; third, define the stationary degree of non-stationary signals making use of 3-D time-frequency spectrum and marginal spectrum, the stationary degree curve of Elcentro seismic recording is protracted according to its defining formula, the stationary degree curve of Elcentro seismic recording which change with time is protracted according to similiar definition.

在HHT方法的应用研究方面，本文做了三部分的工作：首先，利用HHT方法分析了地震工程中常用的Elcentro非平稳强震记录，得到了该记录的振幅－频率－时间分布特性，并将得到的边际谱与傅立叶谱做了比较；其次，应用HHT方法分析了典型的非线性系统－Duffing方程，得到了该方程数值解的振幅－频率－时间分布特性，并将得到的边际谱与傅立叶谱做了比较；最后，利用三维时频谱与边际谱定义了非平稳信号的平稳度，并依照其定义式绘制了Elcentro地震波记录的平稳度曲线，依照类似与依赖与频率变化的平稳度定义，初步尝试编程绘制了Elcentro地震波随时间变化的平稳度曲线。

ResultThe Buxus Microphylla leaf ethyl acetate extraction (high-dose and low dose) have obvious effect on reducing the serum total cholesterol and triglyceride, moreover, the high-dose ethyl acetate extract reducing blood lipid was better than the other extracts.

结果 小叶黄杨叶乙酸乙酯提取物的高、低两个剂量组均有显著的降低血清总胆固醇和三酰甘油的作用，小叶黄杨叶的水提取物和石油醚提取物均有显著的降低血清中总胆固醇的作用，小叶黄杨叶氯仿提取物及正丁醇提取物均无降血脂的作用。

When those days elapsed, adidas classic's theme is based on Playground. Adida Classic is known for its cloth's color and chidren's clothes. Its main color is infused with 1993 Old Millfun. When rotating Trojans, slides and clover ice cream inadvertently arouse childhood memories, playful avant-garde artists such as Delaware, Bob Foundatio, MEWE, Markus Hofko and Gaston Caba also attended the exhibition. Markus Hofko and Gaston Caba are taking photos and clipping video slips for the exhibition while artists expressed their creative ideas through the design of adidas Originals by Diesel. Adidas fully completely neglected the atmosphere of the current mainstream fashion enabling the guests to play to the core.

就在童年的一切在步履匆乱的时代似乎将要被掩埋，adidas三叶草经典系列以『游乐场』为主题，凭借五彩斑斓的色泽及童趣十足的线条为1933 老场坊原本冷色调的空间注入了一派生机盎然而又童趣十足的玩乐意味――当旋转木马、滑梯与三叶草冰淇淋不经意间唤起童年的记忆，更有童心未泯的前卫艺术家Delaware、Bob Foundation、MEWE设计联盟、Markus Hofko和Gaston Caba等为今次派对所特别拍摄的视频短片及摄影作品点缀其间，而艺术家们亦在adidas Originals by Diesel牛仔裤的设计中表现出了个性张扬的创意思考……adidas完全抛却了时下主流时尚派对过于凝重的气氛，令嘉宾们忘情而轻盈地玩耍其间。

The aortic diameter change rates were (-0.2±1.4) mm/year and (-0.18±0.98) mm/year in aortic diameter0 mm group and≥40 mm group, respectively. There was no significant difference between the two groups. The ascending aortic diameter change rates were (0.8±1.6) mm/year in BAV group, and (-0.3±1.5) mm/year in TAV group. The ascending aortic diameter of patients in BAV group enlarged continuously following AVR.

在升主动脉直径0mm组和≥40mm组中，升主动脉直径的变化率分别为(-0.2±1.4)mm/年和(-0.18±0.98)mm/年，两组之间无显著性差异；二叶主动脉瓣组和三叶主动脉瓣组升主动脉直径的变化率分别为(0.8±1.6)mm/年和(-0.3±1.5)mm/年，二叶主动脉瓣组病人的升主动脉直径在主动脉瓣置换术后仍继续扩大。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。