They typically carry financial burdens that outweigh those of their peers, are more likely to work while attending school, and often require significant academic remediation.
2015年12月六级真题（第三套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
N-COUNT
负担；重负
If you describe a problem or a responsibility as a burden, you mean that it causes someone a lot of difficulty, worry, or hard work.