如何使用 "improvement" 造句

1. The baseline to measure improvement is 1990 .
改善措施的基线于1990年确定。
2. But there was room for improvement in certain groups .
但此类情况在某些群体还有改进的空间。
3. He wasn 't sure this was an improvement .
他不确定这是一种进步。
4. Hard data on trade finance are fragmentary , but suggest improvement .
尽管贸易融资的相关硬性数据并不完整,不过确实显示出了好转趋势。
5. There 's nothing wrong with incremental improvement .
渐近式改良并没有什么错。