thirtynum.三十
thirty-somethingn.三十而立
thirty-year glory辉煌30年
thirty-degree cut30度切削
thirty times that of... 的三十倍
thirty-two nucleus三十二核
thirty-second note三十二分音符
thirty odd years ago三十多年前
thirty-second rest三十二分休止符
thirty-day forecast三十天预报
thirty-year mortgage三十年按揭