There are some callbacks for variable system events such as memory warnings and the de-allocation.

代码中有一些对可变的系统事件（比如说内存警告和存储单元分配）的回调。

youdao

Paper also point out the condition of system's transfer function that the time-variable system must require.

论文给出了要实现此双重保密功能，收发端时变系统的系统函数所要满足的条件。

youdao

The kinetic energy theorem of mass variable system is derived from the kinetic equation of mass variable body.

从变质量物体的动力学方程出发，推导出变质量系统的动能定理。

youdao

So, and of course, you know, keeping entropy as a fixed variable for a system like that is extremely cumbersome.

所以，对这样的系统要求它们的熵保持恒定,和一个非常笨拙做法。

麻省理工公开课 - 热力学与动力学课程节选

So the system will not be described by a single state variable during the path.

因此系统将不能被,路径上的单一状态变量描述。

麻省理工公开课 - 热力学与动力学课程节选

If I wanted to use print as a variable name, how do I get the system to decide gee, do I want print as a value for something, or do I want print as a command?

如果我把print当做一个变量名，我如何让系统来决定，我是要把print当做一个命令来用呢，还是要把它当做一个变量名来用呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

Given a free hand in the design, his team developed a continuously variable transmission system that allows the petrol engine and electric motor to work separately or in tandem.

ECONOMIST: MONITORS: And the winners are... | The

Exams produce nice clear results, which can give useful clues about the performance of pupils, schools, teachers, methods and every other variable in the system.

ECONOMIST: Moves away from A-levels and GCSEs

Time is fixed and the learning is variable, when what we need is a system that makes time variable so that the learning can be fixed.

FORBES: Clearing the Path for Learning