It's only nineteen yuan.

　　它只要十九元。

　　They have nineteen days to make up their minds.

　　他們有十九天的時間來做出決定。

　　How many towels are there? There are nineteen towels.

　　有多少條毛巾？有十九條毛巾。

　　I was a mother at the age of nineteen.

　　我在十九歲的時候當了媽媽。

　　I will be nineteen years old tomorrow.

　　明天我將十九歲了。

　　He has nineteen cards.

　　他有十九張卡。