He was dead for three weeks before anyone discovered him.
As soon as he discovered the police, he ran away.
One day while sweeping the compound he discovered seven eggs in a pile of straw.
The prospectors have discovered such minerals as calcite, quartz here.
I never discovered how to open the box.
He discovered how to start the machine.
They have not discovered how to improve their techniques.
Chemists discovered how to make synthetic rubber.
Issac Newton discovered that white light is made of seven colours.
We have discovered that he is quite careless in his work.
I suddenly discovered that I forgot my wallet in the taxi.
We discovered that we had been cheated.
It was discovered that their food was running short.
It was discovered that her pearls were missing.
At last I have discovered what true pleasure is.
Have you discovered when they are going to attack us?你有没有打探到他们将在何时进攻我们?
We'll discover who did it.
Did you ever discover who sent you the flowers?你有没有搞清楚这花是谁送给你的?