a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth"s crust
the 15th letter of the Roman alphabet
the blood group whose red cells carry neither the A nor B antigens;"people with type O blood are universal donors"
中英词源
O 英语字母表的第十五个字母WwW.wentIYI.coM
来自希腊字母omicron,来自希伯来字母Ayin,眼睛，泉源。
o
interjection of fear, surprise, admiration, etc.; see oh.
O
blood type, 1926, originally "zero," denoting absence of A and B agglutinogens.
词态变化
权威造句
1. He signed up as a steward with P&O Lines.
他签约了P&O航运公司，成为了一名乘务员。
来自柯林斯例句
2. "O.O.B.E." is short for "Out Of Body Experience".
O.O.B.E.是OutOfBodyExperience（身外体验）的缩略形式。
来自柯林斯例句
3. I can"t make out whether this letter is an e or an o.
我认不出这个字母究竟是e还是o.
来自《简明英汉词典》
4. It was just gone 7 o"clock this evening when I finished.
今晚我做完的时候刚过7点。
来自柯林斯例句
5. "Is Mary Ann O.K?" — "She"s fine," she said evenly.
