The nature of the geographic separation necessary to isolate populations depends entirely on the biology of the organism and its potential for dispersal.
地理上的隔离是隔离种群所必需的条件，且地理隔离的性质完全取决于生物体的生物学特性及其分散的可能性。
He worked out how to write on rice grains, poppy seeds even human hair, and created the necessary micro-instruments to do this.
他可以在米粒、板栗种子甚至还能在人的头发上写字，还发明了各种必要的微型工具去完成佳作。
It isn't necessary to know anything about sailing—students can learn on the ship.
没有必要知道任何有关航海的知识——学生们可以在船上学到。
Mr. Obama's plan to curb carbon dioxide emissions, though necessary, will be far from cost free, whatever his sunny speeches on the subject might suggest.
尽管奥巴马的二氧化碳减排计划是必要的，但无论他在这个问题上发表的充满希望的演讲可能会暗示什么，这远不是免费的。
Mr. Obama's plan to curb carbon dioxide emissions, though necessary, will be far from cost-free, whatever his sunny speeches on the subject might suggest.
尽管奥巴马的二氧化碳减排计划是必要的，但这远不是免费的，无论他在这个问题上发表的充满希望的演讲可能会暗示什么。
Many governments have put an end to some of the very necessary regulations on cross-border flows of capital, labour and goods, with poor results.
许多国家政府终止了一些非常必要的关于资本、劳动力和货物跨境流动的条例，但收效甚微。
At the outset, it seemed necessary to be on guard against the other two.
一开始，似乎有必要提防另外两个。
It is necessary to do further study and development on the pine cone.
有必要对松果进行进一步的研究和开发。
At the beginning, the pupils put solutions to the homework on the board, then the teachers comment, correct or elaborate as necessary.
一开始，小学生们将家庭作业的答案写在黑板上，随后老师评论、纠正，或在必要时详细解释。
It is considering whether to issue iPhones but not sure it's necessary, noting that more than 700 iPhones were registered on the university's network last year.
该校正在考虑是否分发iPhone，但不确定是否有必要。该校指出，去年该校网络上注册的 iPhone超过700部。
It is necessary to read the labels on the foods in a shop as well.
阅读商店里食品的标签也是必要的。
When the noise remains going on, you should report it to local authorities, or even the police department, when it is really necessary.
如若噪音一直存在，你应该向当地权力机关举报，甚至在必要时报警。
After she knew whole story, she told her son that it was not necessary to be too hard on himself and winning or losing was only half the game.
当她知道了整个故事后，她告诉儿子，没有必要对自己太苛刻，输赢只是比赛的一半。
It is necessary to "cut one's teeth" on the non-glamorous parts of a field.
在一个领域中尝试做一些不那么光彩照人的工作来获得经验是有必要的。
Since you can "t do this on the client side it is necessary to validate on the server."
由于无法在客户端完成这一任务，因此在服务器上进行验证是有必要的。
Have you included all the necessary information on how to get a hold of you?
你把你所有联系方式的必要信息都写进去了吗？
Click OK on the dialog box to make the necessary update to the server configuration.
为了对服务器配置作必要的更新，请单击对话框中的OK。
The installer will move on and load the necessary files to provide the graphical interface.
安装程序将加载必要的文件，以提供图形接口。
The most important step hoteliers can take is to read the feedback they’ve received on TripAdvisor, and take the necessary steps to improve problem areas.
酒店经营者可以采取的最重要一步是阅读他们在TripAdvisor上收到的反馈，然后采取必要的措施改进有问题的地方。
The facilitator should recommend which techniques to use and provide the necessary guidance on how to do so.
主持人应当推荐要使用哪种技术，并提供有关如何进行的必要指导。
It contains only a description of the actions to be performed on the target system but not the files and resources necessary to execute the actions.
它只包含对将要在目标系统中运行的操作的描述，而不包括执行这些操作需要的文件和资源。
The duration required to define the work depends on the length of time necessary to discover and document the information, as well as the time required to gain agreement and approval from the client.
需要花费在定义项目工作上的时间取决于了解和文档化这些信息所必需的时间长短，也取决于需要花费在获得客户的同意和认可上的时间长短。
The normalization checking attribute, if set to on, will normalize the input text if necessary.
如果打开了规范化检查属性，那么会在必要时对输入文本进行规范化。
Each phase contains one or more iterations, which focus on producing the technical deliverables necessary to achieve the business objectives of that phase.
每一个阶段包含了一个或者更多的迭代，每个迭代都关注于产生必要的技术上的可交付物以实现阶段的业务目标。
It focuses on the necessary configuration and connectivity to get them to work together.
本教程将重点讨论为了让其协调工作而所需的配置和连接。
It contains the elements necessary to keep your development focus on the model and not on the implementation details.
它包含了将您的开发精力集中在模型上而不是实现细节上所必需的元素。
MDAT allows the developer to design the application once and generate the code necessary to render the requested content on selected target devices.
MDAT允许开发人员一次性设计应用程序，并生成在所选的目标设备上呈现请求内容所需的代码。
This method will find the properties file on the classpath, so it is necessary to put the directory with this file in the classpath.
这个方法将在CLASSPATH上查找特性文件，因此有必要将包含该文件的目录放到类路径中。
Standardization Analysis is used to understand the operations necessary on source data to standardize it to the correct format.
标准化分析用于理解为将源数据标准化到适当的格式而对其进行的操作。
Standardization Analysis is used to understand the operations necessary on source data to standardize it to the correct format.
标准化分析用于理解为将源数据标准化到适当的格式而对其进行的操作。
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