Condition Has Been Improved 情况已经改善
System has been improved 系统进行了改进
efficiency has been improved 效率可提高
Has been greatly improved 得到了很大的提高
has not been improved 还未得到改善
Environment has been greatly improved 环境有了很大的改善
Has Been Further Improved 得到进一步提高
Thailand's royal palace has been issuing daily updates on the king's health that say it has gradually improved.
VOA: standard.2009.10.15
They had been harassed,she says, by Muslim youths, but since a volunteer group was formed, security has improved.
VOA: standard.2009.08.31
"It seems to me that we should be able to take what has been a tragedy and turn it into an opportunity to create a situation where lives in Gaza are actually directly improved."
VOA: standard.2010.06.10
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