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1·He's got an O level in Russian.

他通过了俄语普通证书考试。《牛津词典》

2·She took six subjects at O level.

她参加了六门课程的普通证书考试。《牛津词典》

3·I got 16 in O level exam. I will study Accountancy in Nan Yang Poly. Mr. Xu, Thank u for teach me Maths and English.

我“O”水准五科总分为16分，我将选择新加坡南洋理工学院专业。徐先生，谢谢你辅导我的英语和数学。

4·Page level sampling reduces I/O significantly since it reads only a percentage of the data pages.

而页级的抽样则可以显著减少 I/O，因为它只读取一定百分比的数据页。

5·A toolbar is associated with each designer, and you can use either the buttons in the toolbar or the top-level menus o switch between the various views of the designer.

工具栏与每个设计程序建立关联，因此可以使用工具栏中的按钮或顶级菜单，在设计程序的不同视图之间进行切换。

6·Increasing the level of logging will cause performance to degrade because of the additional I/O operations that need to be coordinated to write to the log files.

提高日志级别会导致性能降级，因为需要协调额外的 I/O 操作，以便将它们写入日志文件。

7·He's not even very good with theoretical physics. After a brief conversation about centres of gravity, he admits that he failed his O-level in the subject.

他甚至并不擅长理论物理。简单地谈了重力中心问题之后，他承认，自己的这门课没有达到O级。

8·This would give us some level of control over how much additional I/O activity we could unleash on the running system.

这就让我们得以控制在运行的系统上释放的额外 I/O 活动的多少。

9·This uses the compiler flags -O, -O2, -O3, where each level of optimization applies higher levels of optimization techniques to squeeze more and more performance.

这使用编译器标志 -O、-O2、-O3（优化级别依次增高）来进一步挖掘性能潜力。

10·Although BCPL was a high-level language (similar to c), the intermediate code that the compiler generated was called O-code (Object code).

尽管BCPL是一种高级语言(类似于c)，编译器生成的中间代码叫做o - code(对象代码)。