Blood type o can receive only o blood but are "universal donors" because o is acceptable to all other blood types.

O型血的人只能接受O型血，但O型血的人却是万能供血者，因为O型血可以被所有血型的人接受。

youdao

O Can I choose to be okay with this emotion?

在这情绪下，我能还好吗？

youdao

O Can I choose to feel happy while at the same time feeling unhappy?

当感觉不幸福时，我能同时选择感到幸福吗？

youdao

It can be spelled y-o-g-u-r-t or y-o-g-h-u-r-t.

VOA: special.2009.01.19

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。

哈佛公开课 - 计算机科学课程节选

So you can go at 7 o'clock in the evening and kids are not allowed,

所以，你可以在晚上七点的时候去，那时候，孩子就不可以进去了，

神奇的博物馆 - SpeakingMax英语口语达人

O. can boost its influence there.

NEWYORKER: After America

O'Neill can challenge the finding in court, but his brother, Dennis O'Neill, said no decision has been made on how to proceed.

CNN: California suspends Derby-winning trainer over 2010 race

Given the time it takes between recordings, O'Brother can strategize while working out arrangements.

WSJ: O'Brother | A Garden Full of Axes | By Jim Fusilli