彩票的中奖概率很低。

Cǎipiào de zhòngjiǎng gàilǜ hěn dī.

The probability of winning the lottery is very low.

彩票的中奖号码是随机的。

Cǎipiào de zhòngjiǎng hàomǎ shì suíjī de.

The winning numbers of the lottery are random.

昨天他买了一张彩票。

Zuótiān tā mǎile yī zhāng cǎipiào.

Yesterday he bought a lottery ticket.