I. twen·ty [ˈtwenti, 美 -t̬i-] 形 不变的
-  twenty
 -  
 
II. twen·ty [ˈtwenti, 美 -t̬i-] 名词
2. twenty (age):
I. eighty [ˈeɪti, 美 -t̬i] 形
1. eighty (number):
II. eighty [ˈeɪti, 美 -t̬i] 名词
1. eighty (number):
2. eighty (age):
3. eighty (decade):
5. eighty 俗 (speed: 80 mph):
twen·ty-twen·ty ˈvi·sion 名词 no pl
-  twenty-twenty vision
 -  
 
twen·ty-some·thing [ˈtwentisʌm(p)θɪŋ] 名词 modifier
-  twenty-something
 -  
 
twen·ty-four-hour ˈclock 名词
twenty-first 形
-  twenty-first
 -