In variable practice, your brain is more actively engaged and actively processing information, which allows it to hold information better.
在变化练习中，大脑更积极参与，积极处理信息，这使大脑更好地保持信息。
There is one change of variable problem on each of the two practice exams to give you a feeling for what's realistic.
两次练习测验中,都有一道题是关于变量替换的,感觉这是很重要的那样。
Always initialize your variables. PHP will automatically create a variable if it hasn't been initialized, but it's not good practice to rely on this feature.
当需要没有初始化的变量，PHP解释器会自动创建一个变量，但依靠这个特性来编程并不是一个好主意。
Therefore the suggested programming practice is to look up the service in the init method of the portlet and store it in an instance variable.
因此，建议的编程实践是在Portlet的init方法中查找服务，并将其存储在一个实例变量中。
Because the JNDI lookup can be expensive, it is good practice to store the provider object as a member variable of the portlet, and to initialize it in the init method.
因为JNDI查找开销非常大，所以最好的做法是将提供程序对象存储为Portlet的成员变量，并在init方法中对其初始化。
Another bad practice is to use single-letter variable names such as I, j, and k.
另一个糟糕的做法是用单字母的变量名如i,j,k。
This time, they found that those in the variable-practice group performed better on the 60-degree movement than those who trained with rote repetition.
这次，他们发现变化练习组要比持续练习组表现更好。
It has proven by practice that the two solutions both can implement Variable Frequency Control of ac Motor well, and have good applied cost.
实践证明，两种解决方案均能很好地实现交流电机的变频控制，具有良好的应用价值。
The realistic basis of SDAT are: the variable management object, the management subject with strong character, rich and colorful management practice, which are basic to modern administration.
系统动态管理思维的现实依据：变化多端的管理客体、富有个性的管理主体、丰富多彩的管理实践。这正是现代管理所具备的基本要求。
The classic transportation problem is limited in practice. It can be extended to generalized transportation problem with variable limited transportation ability, supply and demand.
经典运输问题在实际应用中有很大的局限性，推广后可以得到具有运输能力限制、供求量可以变化的广义运输问题。
This is a chance variable, and is not convenient to use in practice.
这是一个随机变量，在实际中不便使用。
While this accounted for some of the trend seen toward better practice in younger doctors, Tocci said the results remained the same after controlling for this variable.
Tocci教授说，这种现象也许解释了年轻医生通常拥有较高的疾病干预能力的趋势，在控制了这一变量以后，结果仍然相同。
If you set a data breakpoint on a local variable, the best practice is to remove or disable the breakpoint before the function ends.
如果对区域变数设定资料中断点，最好的做法是在函式结束前移除或停用中断点。
In the light of technical rebuilding engineering practice, the constitution of variable-frequency speed-regulation system and the structure features of inverter are described.
结合技改工程实例，对变频调速系统的构成和变频器的结构特点进行了论述。
In the light of technical rebuilding engineering practice, the constitution of variable-frequency speed-regulation system and the structure features of inverter are described.
结合技改工程实例，对变频调速系统的构成和变频器的结构特点进行了论述。
应用推荐