The gradient of the code equals delta Y over delta X, right.

斜率等于△y/△x，好了。

Bangladesh has many deltas from rivers that flow through it from India and toward the sea.

孟加拉国有许多三角洲，印度的河流流经于此并流向大海。

Here, in the southern region of the park, is one of the largest inland deltas in the world.

这里，公园的南部地区是世界上最大的内陆三角洲之一。

Past cyclones in this low-lying area of river deltas have killed thousands.

此前气旋曾在这一低洼三角洲地区造成数千人死亡。

This is because those areas, called deltas, contain higher levels of ancient microbes to study.

这是因为这些被称为三角洲的区域含有更多需要研究的古代微生物。

And rising sea levels have increased the amount of salt in the river's large delta.

海平面上升增加了河流大三角洲的盐分含量。

The Perseverance rover is headed for an area on the edge of an ancient river delta.

“毅力”号火星车正前往位于古老河流三角洲边缘的区域。

NREM-3 comes with slow rolling delta waves.

NREM-3期的特点是缓慢的delta波。

The country lies along the delta of three major European rivers.

这个国家位于欧洲三条主要河流的三角洲沿线。

The ALAS2 gene is involved in coding for delta ALA synthase.

ALAS2基因参与编码Delta-ALA合酶。

And is this being driven by the very contagious delta variant?

这是由传染性很强的德尔塔变异毒株引起的吗？

The term " delta" is in an earlier paragraph, too.

“Delta”一词也出现在前面一段中。

Mr Gulliver plans a big push in the Cantonese-speaking Pearl River delta.

欧智华先生在珠三角粤语区制定了极大力度的推进计划。

And as your sleep deepens, your brain moves to longer delta waves.

随着睡眠的加深，你的大脑会向更长的波移动。

The question, of course, is whether delta at all changes the dynamic. Here's Celinda Lake.

当然，问题是“德尔塔”变种是否会改变这一动态。以下是塞琳达·莱克所说。

And studies have shown that vaccines work against variants, including the delta variant.

研究表明，疫苗可以对抗变体，包括德尔塔变体在内。

A nearby cemetery looked more like a river delta, water streaming around headstones.

附近的一个墓地看起来更像是一个河流三角洲，墓碑都被水流包围。

Most of the cases have been confined to the Yangtze River delta region.

大多数确诊病例分布在长三角地区。

We even have an example with The Red Stone area as a river delta.

我们甚至有一个红石区作为河流三角洲的例子。

The river system, called a delta, rises more than 40 meters above the crater floor.

这条河系被称为三角洲，高出弧坑底部40多米。