A terrible experience or situation is very bad or very unpleasant.
dreadful
Tens of thousands more suffered terrible injuries in the world's worst industrial disaster.
还有数万人在这场世界最严重的工业灾难中受了重伤。
I often have terrible nightmares.
我经常做可怕的恶梦。
If something is terrible, it is very bad or of very poor quality.
She admits her French is terrible.
她承认自己的法语很糟糕。
You use terrible to emphasize the great extent or degree of something.
I was a terrible fool, you know.
你知道,我那时是个十足的傻瓜。