thirty
num.美 /ˈθɜːrti/英 /ˈθɜːti/
三十
three times ten
例句
My dad has thirty books on his shelf.
爸爸书架上有三十本书。
It takes thirty minutes to walk to school.
走路去学校要花三十分钟。
怎么记
three（三）+ty（表十位）→三十
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三十
three times ten
My dad has thirty books on his shelf.
爸爸书架上有三十本书。
It takes thirty minutes to walk to school.
走路去学校要花三十分钟。
three（三）+ty（表十位）→三十
花声英语按记忆曲线安排复习、听写练拼写、录音打分练发音。开通会员后进度自动保存。