单词有: ninety, eighty, twenty, fifty...
Her weight was under ninety pounds.
她的体重不足90磅。
You got here with ninety seconds to spare.
你们到达这里时还剩有90秒钟。
He's getting on for eighty.
他近八十岁了。
Eighty horses trotted up.
80匹马小跑上来。
I am twenty this year.
我今年二十岁了。
This toy is worth twenty.
这个玩具价值二十美元。
与thirty和forty的单词
thirty:三十,从三十一到三十九中都有这个单词,它们是thirty-one, thirty-two, thirty-three, thirty-four, thirty-five, thirty-six, thirty-seven, thirty-eight, thirty-nine, forty四十,从四十到四十九中都有这个单词,它们是forty-one, forty-two, forty-three, forty-four, forty-five, forty-six, forty-sevsn, forty-eight, forty-nine.