The researchers say many, if not all,people likely have these antibodies but do not always produce or use them efficiently.

VOA: special.2009.03.04

I think she is a character that you can--if not identify with--at least, you can understand and be interested in.

也至少能够理解和感兴趣的角色，所以，在这本书，还有我们下次。

耶鲁公开课 - 1945年后的美国小说课程节选

But there seems to be as much, if not maybe a bit more work in terms of part-time and short-term jobs.

但是就兼职和短期工而言，工作似乎没变少，可能还更多了。

英国的影视产业 - SpeakingMax英语口语达人

If not,they say, the future of food security, economic development and social stability in dry areas will be put at risk.

VOA: special.2010.02.08

This is really, I think, a radical if not heretical idea for the national poet of a Christian people.

我真的觉得这是，激进的，甚至是异端邪说,对一个基督教国家的诗人来说。

耶鲁公开课 - 现代诗歌课程节选

If not,she says, they may be at increased risk for age-related broken bones years after their visits to space.

VOA: special.2009.03.10

And if that's the reason, where do those rights come from if not from some idea of the larger welfare or utility or happiness?

如果是那个原因，那这些权利又是从何而来的呢,既然不是为了更大的福利，或曰功利，幸福？

耶鲁公开课 - 公正课程节选

But the popular meaning of Valentine's Day continues to capture hearts around the world, even if not always on February fourteenth.

VOA: special.2010.02.08

Or if not, are the symptoms independent, will at least fix some of them?

这些症状是独立的吗？,或者至少能修复其中的6个？

麻省理工公开课 - 计算机科学及编程导论课程节选

The study found that losses from obesity are now equal to, if not greater than, those from smoking.

VOA: special.2010.01.13

For some others it might mean being basically restricted to the home, if not all the time, then the only exception being in public, in the company of a close-male relative as chaperon.

在一些别的地方可能意味着,基本上深居简出，即使不是一天到晚，也只有外出是例外，而且必须有一个男性近亲作监护人陪同。

普林斯顿公开课 - 人性课程节选

But many more would have died if not for a tsunami warning from the Japanese Meteorological Agency.

VOA: special.2011.06.07

And yet, it seems to me that there are many activities, and if not many at least several activities, that people do precisely for that reason.

然而，在我看来是有许多活动，如果算不上许多也至少是一些活动，是人们出于那个原因而去做的。

耶鲁公开课 - 死亡课程节选

He says many,if not all, of the top American colleges once had a core curriculum a set of courses required for all students.

VOA: special.2009.10.22

If not, it's sort of become a geek classic.

否则，它就有点呆板了。

哈佛公开课 - 计算机科学课程节选

Calhoun said that for a long time he had believed that the dispute over slavery -- if not settled -- would end in disunion.

VOA: special.2009.03.26

Okay. If not, let's go on to the following.

如果没有,我们继续下面的内容

耶鲁公开课 - 聆听音乐课程节选

If not,the thinking goes, then self-interest will lead to overuse and destruction of shared resources.

VOA: special.2009.10.16

And if not, sleep on it, think about it for a while and then keep going.

如果实在写不出来，就睡一觉，第二天再决定。仔细想一想后继续写。

写作课程比较难 - SpeakingMax英语口语达人

If not,they could face a fine of two thousand dollars a year for every worker.

VOA: special.2010.03.24

Now, the concept of ritual impurity was a central and integral feature of most, if not all, ancient religions.

现在，仪式上的不洁已经是大部分宗教,主要的，整体而言的特点。

耶鲁公开课 - 旧约导论课程节选

Some autoimmune forms of arthritis, if not treated, may cause joints to become deformed.

VOA: special.2010.05.19

but he's also insisting that this is an incredibly difficult, if not impossible, moment of thought.

但他同时坚持，如果可能，这对思维来说也是一个极其艰难的时刻。

耶鲁公开课 - 文学理论导论课程节选

If not treated, malaria can make the victim very sick and even cause death.

VOA: special.2010.04.20

And if we have time today, we'll start in on the photo-electron spectroscopy, if not, that's where we'll start when we come back on Wednesday.

而且如果我们今天还有时间，我们将会开始光电子频谱，如果没有,我们将会在下周三回来时开始。

麻省理工公开课 - 化学原理课程节选

Combinations of drugs are able to suppress the deadly virus in the body -- if not a cure, in the traditional sense but the next best thing.

VOA: special.2010.07.14

So we're going to revisit, if not the Divinity School, at least in people who have more morality than my friends up in the business school.

我们先来回顾一下之前的神学院,或者说比我们商学院的人,更讲道德的人

耶鲁公开课 - 博弈论课程节选

The treatments can cause dangerous and even deadly reactions if not used carefully.

VOA: special.2010.01.25

So poor Lily is also an orphan, at least in the emotional sense, if not in actual reality. Her father, of course, had run off from her mother right after she had gotten pregnant, and then I suppose he came back.

可怜的莉莉也是个孤儿，至少从感情的角度上看是,如果你认为在现实情况不是，她的父亲，当然，在她母亲怀孕后,就开溜了，然后我猜测他又回来了。

耶鲁公开课 - 1945年后的美国小说课程节选

If not,what does it mean we are?

如果不是，那我们是什么？

耶鲁公开课 - 新约课程节选