While some practical, real-life samples can prove pretty useful in your research, you still have to understand that even an amazing example abstract will be of no use if you do not understand why you need this section in your paper, or what purpose it serves.
So, let's try to look at how to write abstract before we move to actual abstract examples.
Often, the student needs to write an abstract in not only German, Spanish, or French (depending on the country you study in) but also English.
An English abstract (in addition to, say, a German abstract) is necessary to ensure that a research paper will be accessible to an international market. Also, as Samac, Prenner, and Schwetz point out, an English translation of the German text (if your thesis is in German) must be provided on the very same page to meet international standards (2009: 56).
Note: Academic English is quite a bit different from academic German, Spanish, and other languages.
We recommend that you read research papers in English to get a feel for the differences in style and structure (cf. Caution: The abstract is NEVER a conclusion of your research paper and it differs from the conclusion in many aspects.
It increasingly concerns international students as well.
Nowadays, it is becoming more and more important to write the whole paper in English, rather than in the native language of the country a student studies in.
You have very limited space to convince the reader that your work is worth reading and that your results are relevant.
When you write your abstract, you have to spill the beans and make it very clear what the reader can expect from your work, particularly as far as the results are concerned.