His master was once confined to his bed with a dangerousillness.
有一次，他的主人生了一场大病。
2
The illness is dangerous, because it is involved in half of all automobile accidents.
这种病很危险，因为在所有的交通事故中，有一半都与它有关。
3
But recent studies suggest that noise could even be dangerous, increasing stress levels and risk of illness - the word "noise" does derive from the Latin "nausea" after all.