Reference My former employer provided me with a very good reference.
我以前的雇主给我写了一封很好的介绍信。
This Dictionary of the Usage of the English Language is a very good reference book.
这本《英语用法大辞典》是本不错的工具书。
In real production and processing, it has very good reference and directive significance.
在实际的生产加工中，具有很好的借鉴和指导意义。
In real production and processing, it has very good reference and directive significance.
在实际的生产加工中，具有很好的借鉴和指导意义。
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