英 [əʊ] 美 [oʊ]
int. 哦；哎呀（表示惊讶或恐惧等）
oh /əʊ/ TEM4
习惯表达 You use oh to introduce a response or a comment on something that has just been said. (引出答话、评语) 哦
"Had you seen the car before?"—"Oh yes, it was always in the driveway."
“你以前见过这辆车吗？” — “哦，见过。它总在车道上。”
You use oh to express a feeling such as surprise, pain, annoyance, or happiness. (表达情绪) 哎呀
"Oh!" Kenny blinked. "Has everyone gone?"
“哎呀！”肯尼眨了眨眼，“大家都走了吗？”
习惯表达 You use oh when you are hesitating while speaking, for example, because you are trying to estimate something, or because you are searching for the right word. (表示犹豫) 呃
I've been here, oh, since the end of June.
我是，呃，从6月底到这儿来的。
a midwestern state in north central United States in the Great Lakes region
同义词： Ohio / Buckeye State
哦；哎呀（表示惊讶或恐惧等）
氢氧
其机理主要是光催化剂二氧化钛吸收光子，与表面的水反应产生羟基自由基(·OH)和活性氧物质（·O，H2O2），其中羟基自由基(·OH)是光催化反应的一种主要的活性物质，对光催化氧化起决定作用。
羟自由基(OH)是细胞毒性较大的氧自由基之一，但其性质活泼，寿命极短，一般方法难以直接检测。
氢氧根（OH-）是一个离子团，不是氧化物～ 氧化物，相对分子质量最小的氧化物更准确的是过氧化氢。 氢氧根是离子团 氧化物啊！
I thought, oh my gawd!
我想，哦，我的上帝！
Oh, Amy, I love you.
啊，埃米，我爱你。
"Oh dear, oh dear." McKinnon sighed. "You, too."
“啊，天哪，”麦金农叹息道，“你也一样。”
"Let me get back to you on that. Oh,oh,oh -- in college, the boyfriend who absolutely forgot Valentine's Day.
VOA : special.2010.02.08
They sit in rows just as they would in the airplane and they say, "Oh, when are we gonna be in Japan?"
他们像在飞机上一样坐成排,然后说：,“我们什么时候到日本？“
媒体、教育、市场课程节选 : 麻省理工公开课
and then one day I'll be like, "Oh, I want to dress like a clown today, so I will."
而可能有时候，我想，“喔，今天我想打扮成一个小丑，然后我就这么做了。”
SpeakingMax英语口语达人 : 时尚让人兴奋
On December twenty-fourth,nineteen-oh-six, radio operators on ships in the Atlantic Ocean near the American coast began hearing strange things.
VOA : special.2010.12.08
"Oh,yes." "Well,we get on the job right away. And in one hour, even less than one hour, we lose the fix.
VOA : special.2009.07.19
It lives at the mercy of DirecTV and, uh oh, it?s about to die.
Dr. ANDERSON: Oh, well the evidence on the relationship between educational achievement and income is very widespread.
Mr. DANIELS: (As Bernard Berkman) Oh, I've got you Tuesday, Wednesday and Saturday and every other Thursday.