The crown of thorns starfish is large, twenty-five to thirty-five centimeters in diameter, and has seven to twenty-one arms that are covered in spines.

棘冠海星很大，直径长达25到35厘米，有7到21条手臂，上面布满了刺。

youdao

Rosalyn Schanzer shows readers the young man who was only twenty-two years old when he left Plymouth,England in eighteen thirty-one.

VOA: special.2009.02.27

There's twenty-one days, there's thirty days, there's twenty-four hours. Now look at this!

有二十一天法,三十天法,二十四小时法,还有这个

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So at a given level of overweight out here -twenty-seven, twenty-nine, thirty-one, thirty-three are the body mass index, the women are more likely to get Diabetes then the men are.

在超重情况下,如果体重一定,这里的27,29,31,33,表示体重指数,女性比男性更易患糖尿病

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

L.T. member named Britnee Brown, who has been with the company for a little more than a year, took a call that was a record five hours, twenty-five minutes, and thirty-one seconds long, from a woman on the East Coast interested in Masai Barefoot Technology shoes, which purport to mimic supposedly salubrious barefoot-on-the-beach walking with curved rubber platforms.

NEWYORKER: Happy Feet

Thirty-one-year-old Britney looks a great deal different from twenty-six-year-old Britney.

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