First is big o notation.

首先是大写的字母“O”标记。

youdao

The child's mouth formed a big O in surprise.

那孩子惊奇得张著嘴像个大O字。

youdao

There are some big clumps o' columbine in th' garden.

花园里有几大丛漏斗花。

youdao

As the love interest, Alex O'Loughlin joins a growing legion of hunky stars from Australia making it big on American screens.

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You can actually say big O of 1, big O of 1 being constant time, the same number of steps.

其复杂度为O，表示时间是一个常量，所用的步数是相同的。

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I run out of the house and then usually around 3 o'clock somebody points out, in one case a homeless man, that I have a big glob of shaving cream in my ear or-- because I neglected to actually look in the mirror while I shaved.

然后冲出家门,大概到了下午三点时，会有人跟我说，有一次是一个流浪汉，告诉我，我耳朵上有一团剃须膏-,因为我剃须时忘了,照镜子。

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We covered concepts like Big O Notation and binary trees.

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So I went into this knowing that this had to be a big old 10 o'clock--well, its 9 o'clock--drama with broad appeal.

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"This is big news, " O'Brien said.

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