环境变量

There are some variables set by the environment to access the name of the current file as well

一些变量是通过设置环境变量来访问当前文件的名称以及

You can also create methods that depend on more than one environment variable.

你也可以创建一个依赖于更多环境变量的变量。

Print the value of environment variable varname to be given to your program when it starts.

打印环境变量 varname 的值，这个变量会在你的程序启动时传给它。

Your PATH is an environment variable for your shell, and changing it depends on the shell you are using.

你的PATH变量是你SHELL中的一个环境变量，对它的改变取决于你所使用Shell。

Using annual hairtail catch and fishing effort data between 1951 and 1984, as well as time series of precipitation, wind speed, and sea surface temperature, interannual trend and variation of hairtail catch in East China Sea were analyzed and a regression catch model incorporating fishing effort and environmental variables were established.

利用1951~1984年东海带鱼年渔获量和捕捞努力量资料，以及降雨、风速和海表温度等的时间系列，分析了带鱼渔获量年际变化与捕捞努力量及环境因素的关系，并建立了渔获量对捕捞努力量和环境变量的回归模型。

The value changes for your program only, not for GDB itself. value may be any string; the values of environment variables are just strings, and any interpretation is supplied by your program itself. The value parameter is optional; if it is eliminated, the variable is set to a null value.

这个改变只针对你的程序，不影响 GDB 本身。value 可以是任何字符串，环境变量的值仅仅是字符串，任何解释都是你的程序自己的。value 参数是可选的，如果没有，变量会设为空值。

What we will do is place our shellcode in an environment variable, and then overflow the buffer with the address of this variable in memory.

我们所做的就是把shellcode放到环境变量中去，然后用这个变量在内存中的地址来使缓冲区溢出。

Parantica sita, Stichophthalma howqua, Acraea issoria, Libythea celtis and Zemeros flegyas only lived in the sampling sections with good condition.

青凤蝶沿城市生境梯度的数量变化能够很好地反映沿城市梯度的环境质量的变化情况，因此，青凤蝶是环境变量较好的指示物。

Based on Hutchinson niche and Guangxia Cao\'s definition, Fuzzy hypervolume niche evolves the theory of fuzzy niche: the niche is a fuzzy hypervolume; the niche of the species is a hypervolume with fuzzy boundary which is formed by the n-dimensional resources (time, space, temperature, humid, trophic,...) necessary for the species\' continuous existing and multiplying; membership of a point in the niche is equivalent to the adaptive degree of the species to the point of the environmental resources.

在Hutchinson生态位和Guangxia Cao的定义的基础上，模糊超体积生态位发展了模糊生态位理论：物种的生态位是可以使物种生存和不断繁殖的n维环境变量(时间、空间、温度、湿度、营养……)所形成的边界模糊的一个n维超体积；隶属函数表明n维资源空间的一个点x属于生态位的程度，也表明物种对环境资源的适应程度。

Occurrence records from 1864 locations and 34 environmental variables from Daymet datasets were gathered, four modeling methods including Logistic Regression, Classification and Regression Trees, Genetic Algorithm for Rule-Set Prediction and maximum entropy method were used to generate potential geographic distributions for Dreissena polymorpha in the continental USA. Then three statistical criteria including area under the Receiver Operating Characteristic curve, correlation and Kappa were calculated to evaluate the performance of the models, followed by analyses of major variable contributions.

论文以1864个美国外来入侵物种斑马纹贻贝定点发生数据和开放式基础地理信息数据库Daymet的34个环境变量为主要信息源，采用逻辑斯蒂回归、分类与回归树模型、基于规则的遗传算法、最大熵法4种途径，建立美国大陆部分潜在生境预测模型，从接受者运行特征曲线下面积、Pearson相关系数、Kappa值3个方面来检验模型预测精度，在此基础上分析斑马纹贻贝的空间分布规律及其环境影响因素。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐