每一次更换的题目大概是淘30%到40%的旧题，并且补充相应数量的新题，每一次在换题完成之后，题库就会相对的比较的稳定直到下一次的换题时间。

There are 30% to 40% old questions each change and there are some amounts of makeup. After each change, it will be the new time of change.

youdao

我们的地球相对来说比较小，绕赤道一周只有24902英里。

Our planet Earth is comparatively small, with only about 24,902miles around the equator.

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你知道，罗西家具公司是一家澳大利亚公司，和一些商业街上的商店相比，它的规模仍然相对比较小，但是它有向外国市场扩张的计划。

As you know, Furniture Rossi is an Australian company, still comparatively small compared to some of the high street stores, but it's got plans to expand into foreign markets.

youdao

Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.

要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快

耶鲁公开课 - 生物医学工程探索课程节选

so that the relatively small distances like from San Francisco to LA, we travel through Greyhound bus

所以相对比较短的距离，比方说从旧金山到洛杉矶，我们坐灰狗汽车，

和朋友一起逛洛杉矶 - SpeakingMax英语口语达人

They're pretty impressive looking. But they would be big, but still that would be a lot easier to transport and handle than a whole box or closet full of scrolls.

看起来觉得不可思议，它们虽然很厚，但它们仍然比较容易携带使用,相对于装满卷轴的箱子或书橱来说。

耶鲁公开课 - 新约课程节选