Kao said she cautions against forming any generalizations based on any one of the studies, noting that more backgroundcharacteristics of the students need to be studied and explained.
Kao 说她曾警告，不要根据任何一项研究得出任何一般化的结论，还提出需要进一步研究和解释这些学生的背景特征。
2
Would look at different backgroundcharacteristics in both cases - over-time versus cross-sectional.
我们检视两者不同的背景特点-时间与跨界域。
3
On the other hand, the database of simple observation can not intuitively reflects the sample plots and their backgroundcharacteristics.