例句：It is not known what causes the disease.
Greed is a disease of modern society.
The new test should aid in the early detection of the disease.
Diet plays an important role in the management of heart disease.
High blood pressure is a common accompaniment to this disease.
Recent research has thrown new light on the causes of the disease.
According to official statistics the disease killed over 500 people.
例句：I missed a lot of school through illness last year.
He died after a long illness.
If your child shows any signs of illness, take her to the doctor...
She returned to her family home to recover from an illness.
Many people suffer from mental illness at some point in their lives.
The illness can be treated provided it's caught early enough.