Indeed,the problem may have become worse.
事实上,问题可能已变得更糟.
Even worse,some of it has been polluted.
更糟的是,它们中的一些已被污染了.
What were your worst subjects?
你最差的科目是什么?
Now is the time to prepare for the worst.
现在,我们应该做好最坏的准备.
I also had my worst experience that day.
那天也有我最糟糕的经历.