I was courting Billy at 19 and married him when I was 21.

我19岁时和比利谈恋爱，21岁时嫁给了他。

《柯林斯英汉双解大词典》

I have lost a total of 19 pounds and have been pretty much in a holding pattern for the past three to four weeks.

我的体重共减少了19磅，过去三四周没什么变化。

《柯林斯英汉双解大词典》

When I got to the age of about 19, I wondered if something was there.

当我19岁的时候，我怀疑是否有什么东西在那里。

youdao

"I'd describe him as a normal, average 19-year-old in England today.

VOA: standard.2010.05.07

So hopefully if some of you have your calculators with you, you can confirm the answer that I got, which is that the energy is 7.82 times 10 to the -19 joules.

所以如果你们带了计算器,希望你们也能确认一下，我们算出的答案，能量等于,7，82乘以10的-19次方焦耳。

麻省理工公开课 - 化学原理课程节选

*10^-19 That is 1.6 times 10 to the minus 19 and I write joules.

。,然后我又写了焦耳。

麻省理工公开课 - 固态化学导论课程节选

Hwy 83, the road running through the region, is a scenic alternative to I-19 between Nogales and Tucson.

BBC: Arizona��s top five scenic drives

By July I was doing 30-40 mile rides and by August I was doing them pretty hard, maintaining 18-19 miles per hour on the flat parts.

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In the company's first season without Wagner since anti-German sentiment in 1918-19 caused by World War I, the Met will present six new-to-New York productions, the fewest since Peter Gelb's first season as general manager in 2006-07.

WSJ: Met cuts ticket prices following box office slump