today/ tə'deɪ /

1.adverb
今天

I hope you're feeling better today.
我希望你今天感觉好些。
2.adverb
(at the present time) 现在

This is the best translation available today.
这是现存的最好的翻译。
3.noun [u] 
今天

Today is Thursday.
今天星期四。
4.noun
(the present time) 现今

the Africa of today
现今的非洲
what day is it today?
今天星期几?
a week ago today
上星期的今天
today is the 4th of March
今天是3月4日
today's paper
今天的报纸