得使用

In the forth chapter, betulin was oxidized by Jones oxidation in step 1 and converted to betulonic acid, then betulonic acid was reduced by sodium borohydride in step 2 and converted to betulinic acid.

第四章使用琼氏氧化剂氧化白桦酯醇，硼氢化钠还原制得白桦酯酸。

RAW Height Map#define STEP_SIZE 16 // Width And Height Of Each Quad#define HEIGHT_RATIO 1.5f // Ratio That The Y Is Scaled According To The X And Z HDC hDC=NULL;// Private GDI Device ContextHGLRC hRC=NULL;// Permanent Rendering ContextHWND hWnd=NULL;// Holds Our Window HandleHINSTANCE hInstance;// Holds The Instance Of The Application bool keys[256];// Array Used For The Keyboard Routinebool active=TRUE;// Window Active Flag Set To TRUE By Defaultbool fullscreen=TRUE;// Fullscreen Flag Set To TRUE By Defaultbool bRender = TRUE;// Polygon Flag Set To TRUE By Default 这里我们用了一个字节数组g_HeightMap

在这篇教程中图的大小是1024×1024.STEP_SIZE是我们用来绘制地形的正方体的大小，减小步长，地形图就会变得更加平滑。有一点很重要，步长越小你的程序所做的工作就将越多，特别是在使用大的高度图时。HEIGHT_RATIO用来缩放地形的Y轴的值，较小的HEIGHT_RATIO可以用来绘制较平的山，较大的HEIGHT_RATIO用来绘制较高的山。在下面的代码中，你会看到变量bRender。如果bRender的值为真，我们就填充模式绘制多边形，如果它的值为假，那么我们就用线框模式绘制地形。

The main achievements of the project are as follows: 1 the hypothesis that a decrease in seed mass causes an increase in mean dispersal distance has been tested based on the experiments of weed dispersal by wind. The experimental results partly support the hypothesis. The results will help farmers to make an optimal strategy of weed control; 2 a statistic method for inferring probabilistic distribution function of a random variable has been developed, by which probabilistic distribution functions of weed species dispersal have been determined; 3 the reproduction structure of Bromus sterilis has been studied; 4 a more complex CA model with 25 neighborhood cells were built, which can simulate spread of a weed population. This work promotes developments in both theory and application of CA models; 5 the "mean law" in weed control has been proposed. Accordingly, the algorism of patch spring may be calibrated; 6 the "patch" and "true patch" have been mathematically defined so that herbicide can be efficiently applied; 7 simulation validates that initial configurations of weed will affect dispersal of its population and strategies of controlling it, or its distribution patterns affect its dispersal progresses.

主要完成的工作和取得的成果有：1）用实验证实了重量较轻的杂草种子并不一定飞得比较重的远，其结果有助于农民制订杂草的优化控制策略；2）发展了一种推断随机变量分布函数的统计方法并用它来获得了几个杂草种的扩散分布函数；3）对杂草Bromus sterilis的繁殖结构进行了研究；4）建立了一个具有25邻的较复杂的能模拟杂草扩散的CA模型，并在理论和应用方面促进了CA模型的发展；5）在杂草控制方面提出了&平均法则&，据此可对按块施药方法进行校正；6）精确地定义了&块&和&真块&以便在杂草控制中能更有效地使用除草剂；7）模拟证实杂草种群的初始配置影响其扩散和控制策略，或者格局影响过程。

That golden sea with dazzling waves,mountain-high-an immensity of wheat field for t hree days fly,where my fat her stands sho ulder high,my elder brot herexpo sing only his head,my granny falling into t he sea up2o n her t read,above me golden billows surging like a crestof a hundred feet and I hold my breat h,jumping twotimes and t hree,which ends in a failure to reach t he earsof wheat.

这是一段关于麦田的生动描写。作者使用夸张的修辞手法把人在麦浪中的情景描绘得出神入化。在此段的一开始，作者就用&golden sea&描绘出麦田的色彩，用&mountain high&比喻麦子的高度，紧接着又用了&for three days&的数字夸张手法描绘出麦田的浩瀚无垠。

After a while it wasn't fun anymore to have as many Rare Candys and Masterballs as I wanted.

使用了之后，游戏开始变得无趣因为你能够有很多的&稀有糖果&以及&大师级的球&。

The cheap and easily available nonmetal selenium catalyst possesses both efficiency to catalytically activate carbon monoxide and the function of phase-transfer catalysis. What is more, it can be recycled.

价廉易得的非金属硒作催化剂不但具有良好的催化活化CO的性能及反应过程相转移催化特性，而且能循环使用。

The study investigated the spatial preposition acquisition over among Chinese EFL learners. It was to explore whether there exists a correlation between their use of the preposition and the centralness of spatial meanings of the word.

本文主要调查了中国二语学习者英语空间介词over 的习得情况，并从原型理论和中心—边缘意义的角度讨论了在空间意义方面over 的意义核心程度与学习者使用over 一词的空间意义之间是否存在相关性。

The purpose of this study is to demonstrate the successful induction of in vitro chondrogenesis of mesenchymal stem cells.

本研究的目的是提出以体外模式使用问叶干细胞可以成功地具有软骨再生作用以建立一个可靠而可重覆得著的细胞培养模式。

I've been using the One Step face base for about 3 years I love the coverage it gives without it looking heavy and cloggy and although I'm 50+ I have had compliments about my complexion, while wearing One Step face base I must stress.

我已经使用这款一部到位粉底将近有三年的历史了。我喜欢它的妆容，一点都不显得厚重。我已经50岁了，可是我得强调一点是，当我用上一部到位粉底时，我仍然可以听到别人对我的脸进行赞美的话语。

Madonna August will be over 50 birthday, her efforts to rejuvenate maintenance, and used all sorts of extreme, the United States "Star magazine" find this Clonorchis her vigorous solid-containing cream of the skin, resulting in side effects, the chest chest hair has grown every month 600 US dollars also spent much use beeswax hair removal.

麦当娜8月将过50大寿，她努力保养回春，无所不用其极，美国《明星周刊》爆料，她搽含有睾固酮素的乳霜护肤，结果产生副作用，胸口竟长出胸毛，每个月还得多花600美元使用蜜蜡除毛。

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。