num.三十

I'll be thirty next year. 明年我就滿三十歲了。

I get up at six thirty every morning. 我每天早上六點(diǎn)半起床。

There are more than thirty footmen in this hotel. 這家旅館里有三十多名仆役。

She has served the family faithfully for thirty years. 她為這個(gè)家忠心耿耿地操勞了30年。

There were many people with leprosy around the age of thirty. 在三十年代有很多麻瘋病人。