By learning Pinyin, you can accurately understand the pronunciation of Chinese.

He reached the finish line with his last bit of strength.

He mustered his last strength and reached the finish line.

The key to success is in your own hands.

He is posting private tweets by creating a private account.

Please make sure to lock the door before you leave the house.

He is good at playing the black keys.

She played the white keys of the piano briskly.

You must never show this secret key to anyone else.

He encrypted the message using a public key.