1. Unthoughtful mistakes and plagiarism are issues of different nature.

2. Please forgive for my any unthoughtful.

3. If we make "American dream" unthoughtful(indulge in the wild fantasy), regardless our own current situation, the badly need for energy will bring heavy burden and endless trouble for all humankind .

4. Today we'll get a chance to come across one example of human unthoughtful behavior.

5. In the monitoring system of an old dam, there are usually some factors influencing the dam safety monitoring, such as unthoughtful designs, imperfect and spoiled equipments and so on.

6. "Tom's getting very profound, " said Daisy, with an expression of unthoughtful sadness.

7. A creative person is neither a utopianist nor an unthoughtful daredevil.