They simply sense changes in their environment, as for example when the mound's wall has been damaged, altering the circulation of air.
它们只是简单地感觉到它们所处环境的变化，例如，当土堆的壁被破坏时，会改变空气的循环。
The idea is that around the year 1800 CE the human population became large enough, around a billion people, that its activities started altering the environment.
这种想法出现于公元1800年左右，当时人口变得足够多，大约有10亿人，人类的活动开始能够改变环境。
A major invention was the adjustable strut that could precisely set the depth of the plow by altering the distance of the blade and the beam.
一个重大的发明是可调节的支柱，通过改变刀板与横梁的距离来精确地设置犁的深度。
Avoid altering the dimensions of the images.
避免更改图像的尺寸。
Each user can choose a Perl version by altering the PATH variable.
每个用户都可以通过改变PATH变量，来选择一个Perl版本。
A dam can affect local rainfall by altering the humidity of an area, experts say.
专家说，大坝可以改变一个地区的湿度而影响地区降雨。
It provides a number of user configurable plug-ins for altering the behavior of the grid.
它提供了一些用户可配置的插件，用于改变网格的行为。
The DBA can map the buffer pool to the tablespace when creating or altering the tablespace.
DBA在创建或更改表空间时可以将缓冲池映射到该表空间。
"Climate change is already altering the character of the places we know and love," Hayhoe says.
气候变化早已在改变我们熟悉和爱恋的土地的特征。
In addition, management is resistant to altering the existing presentation and business layers.
另外，管理人员也反对修改现有的表示层和业务层。
This is necessary for altering the data in a database — something we'll take a look at later on.
这是在数据库中更改数据所必需的—稍后我们会看到这一点。
The audience is limited to about 100 people because of restrictions on altering the Ming-style garden.
由于明代园林无法进行大改造，观众的数量限制在一百人左右。
This can be useful if you want to add some hidden metadata to a file without altering the file's content.
如果想向文件增加一些隐藏的元数据，而不必修改文件内容，这就很有用了。
The code is inflexible because you can't change or remove assertions without altering the application code.
这种代码是不灵活的，因为不能在不改变应用程序代码的情况下改变或者删除断言。
There exists no specification or standard to negotiate resource representations by altering the resource URI.
现在没有提供通过改变资源URI来协商资源表示形式的规范或标准。
In general, plugins provide new functions to an existing application without altering the original application.
一般来讲，在不更改原有应用程序的情况下，插件为现有应用程序提供新功能。
Dynamically responding to changing business conditions by altering the rules and decisions governing the business.
通过不断改变控制业务的规则和决策，动态地应对业务环境的变化。
By altering the length, number and arrangement of strands, the scientists were able to construct several 3d shapes.
科学家们通过改变其长度、数量及链的排列，能够建造若干三维形状。
Third, the U.S. cannot reverse the greater trends set in motion by globalization by altering the value of the yuan.
第三，美国并不能通过调整人民币汇率来逆转全球化趋势。
Be careful when altering the logins here, because the changes may break previously installed and working applications.
在对登录进行更改时请多加小心，因为这些更改可能会破坏以前安装的且正在运行的应用程序。
Data protection, including adding a security policy, can be done when creating the table or later by altering the table.
数据保护，包括添加安全策略，可以在创建表时进行，也可以在创建表之后通过修改表来实现。
This adds the needed function without significantly altering the original code, possibly with lower cost and less risk.
这就要添加所需的功能，但并不对原始代码进行大幅度修改，成本和风险可能更低。
Edit mode. This component provides a user interface for altering the content of the information of a single data element.
此组件用于为改变单个数据元素的信息内容提供用户界面。
Consider repainting the room, or even just altering the color palette with accent pillows, a new bedspread, or colored lights.
考虑一下重新粉刷你的房间，或者只是局部改变颜色，例如使用色彩艳丽的枕头、一张新的床单、或者小彩灯。
In fact, they can even improve the sleep you get at night since they prevent you from altering the sleep cycle you've developed.
事实上，午睡可以阻止你改变已形成的的睡眠周期，甚至能改善晚上的睡眠。
This option is important when trying to quickly get into the flows of the message without significantly altering the behavior.
当尝试在不大幅度改变行为的情况下快速进入消息流时，此选项就非常重要。
This option is important when trying to quickly get into the flows of the message without significantly altering the behavior.
当尝试在不大幅度改变行为的情况下快速进入消息流时，此选项就非常重要。
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