黑腹果蝇种组(species group)祖先枝的分歧大概发生在55 百万年前(mya),黑腹果蝇亚组(species subgroup)祖先枝的分歧发生在44 百万年前(mya),在进化尺度的果...
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我小心地指导了一组志愿者用两种不同方式推广我的书。
I carefully instructed a group of volunteers to promote my book in two different ways.
通过选取一组合适的入口参数,设计了一种在平面上具有梯形入口的水下入口,并进行了验证。
By selecting a group of suitable entrance parameters, a submerged inlet with the trapezoid entrance on the plane surface is designed and verified.
我们假设这些鱼中的其中一组具有遗传的灵活性,可以发现并取食另一种未被其他鱼利用的资源。
Let's suppose that a group of these fish had the genetic flexibility to discover and feed off another resource that was unused by the other fish.
Because it takes three units where there's only four choices at each position to have at least 20 unique combinations.
因为每个位点上仅有四种可能性,只有采用三个碱基一组,才能取得至少二十种不同的组合方式
There are 64 combinations of three bases and I only need to describe 20, so there's combinations to spare.
三个一组的碱基产生六十四种组合,而我只需对应二十种氨基酸,所以一种氨基酸会对应不同密码子
You find some way of systematically going through the list. Yet, I often see people, when they're debugging, proceeding at what, to me, looks almost like a random fashion of looking for the bug.
是不是目标元素,我们有一种系统化的,遍历数组的方法,然后我经常看到,有些人调试的时候。
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