There are four levels of cover.
涵盖范围包括了四种不同等级。
The education system was structured in four levels.
教育有四个水平等级。
Let's consider four levels of a generic operation.
让我们考虑一个通用操作的四个步骤。
So you have to drill down four levels to get the data.
因此，为了获取数据，必须深入4层。
Both figures show the four levels of the example process.
两个图都显示了示例流程的四个级别。
All of these four levels form the core of this research.
这四个层次的指标体系构成了本文的研究核心。
There are four levels of sleep, each being a little deeper…
睡眠分为四种层次，每层都比上层的状态深一点。 …
There are basically four levels of wealth you must aim to attain.
基本上有四个层次的财富，你的目标必须实现。
Notification of Unusual Event is the least serious of the four levels.
异常事件通报：最轻级的紧急情况。
Dependent variables are that graduate students career planning level and its four levels.
因变量即研究生职业生涯规划水平及其四个层面。
We have four major RAID levels that interest us, each offering different results.
我们有四类感兴趣的主要RAID级别，每种配置结果各不相同。
Duration can likewise be broken down into four main levels.
同样地，持续时间也可用分为四个主要级别。
Impact can be broken into four main levels.
影响可分为四个主要级别。
There are four difficulty levels like Simple, Medium, Difficult and Challenge.
有四个一样简单，中等，困难和挑战的难度级别。
There are four difficulty levels like Simple, Medium, Difficult and Challenge.
有四个一样简单，中等，困难和挑战的难度级别。
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