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例句：
1、There have been some problems but basically it's a good system.
虽然出现过一些问题，但这基本上仍不失为一个好系统。
2、There are some obvious practical applications of the research.
这项研究有一些明显的实际用途。
3、Some people don't know when they're well off.
有些人身在福中不知福。