Examples
wǒ我jīn nián今年shí jiǔ十九suì岁。
我今年十九岁。
I am 19 years old.
在十九世纪三十年代的大萧条时期，许多富人在股市崩盘中失去了一切。
During the Depression in the 1930's, many wealthy people lost everything in the stock market crash.
围棋使用十九路棋盘，共361颗棋子(181颗黑子与180颗白子)。
On a 19x19 lines board, Go is played with 361 stones (181 black and 180 white).