除灰过多，火层低于炉栅顶端，而总层又偏高。

Ash is overmuch, fire resistant layer below the furnace, and the total floor joists top and on the high side.

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像波基斯页岩这样的化石层表明进化不应该总被看作是一个缓慢的过程。

Fossil formations like the Burgess Shale show that evolution cannot always be thought of as a slow progression.

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在勘探早期，就潜在储层的分布和质量我们可以从总的岩性得出某些通用的结论。

In the early stages of exploration certain general conclusions as to the distribution and quality of potential reservoir could be made from their gross lithology.

youdao

So to figure out bonding electrons, -- what we take is that number 18, which is our total number of electrons we need to fill valence shells, and we subtract it from our number of valence electrons, which is 10.

那么为了找出成键电子，我们将十八，也就是填满所有价壳层,所需要电子的总个数，减去我们所有的价电子的个数，也就是十。

麻省理工公开课 - 化学原理课程节选