three basic operations in
... 逻辑运算（Boolean Operation） 逻辑代数中的三种基本运算（Three Basic Operations in 几种导出的逻辑运算（Several Educed Logic Operation） ...
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three basic operations in
的三个基本操作
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The majority of the sample was able to perform as high as level four (out of five) of the literacy test, meaning they were able to read, comprehend and answer questions about a simple text, and level three in numeracy, i.e. they were able to perform basic arithmetic operations.
UNESCO: Country Profile: Angola