It's only nineteen yuan.
它只要十九元。
They have nineteen days to make up their minds.
他们有十九天的'时间来做出决定。
How many towels are there? There are nineteen towels.
有多少条毛巾？有十九条毛巾。
I was a mother at the age of nineteen.
我在十九岁的时候当了妈妈。
I will be nineteen years old tomorrow.
明天我将十九岁了。
He has nineteen cards.
他有十九张卡。