These levels come from outside activities that penetrate the classroom structure, from teaching activities, and other noise generated inside, which can be exacerbated by room reverberation.

这些（噪音）可以是穿透教室建筑结构的室外活动声、教学活动的声音以及室内产生的其它各种声响，这些声音都会因为房间的回声效果而被放大。

youdao

And these levels, remember, are evenly spaced.

和这些能级，记住它们是均等间隔的。

youdao

These levels of natural and background radiation is normal.

但这些都只是正常辐射。

youdao

"The new treaty that the U.S.and Russia are now negotiating would drop these levels even lower to somewhere between 1,500 and 1,675 deployed strategic warheads and somewhere probably below 800 strategic nuclear delivery systems,"

VOA: standard.2009.12.07

But you notice up here how close these levels are, so we are looking at very, very fine distinctions.

你能看到这些层有多接近，所以我们是在观察非常非常细微的差别。

麻省理工公开课 - 固态化学导论课程节选

So then you could explain in terms of these levels.

你可以用这些层级来解释。

麻省理工公开课 - 固态化学导论课程节选

The vast majority like holding PetSmart shares but not buying them at these levels.

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It is very hard to believe that these levels represent full reckoning of an inventory correction.

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If these levels are reclaimed, it would negate some of the power of the down move.

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