对流区的范围直达太阳表面，占有太阳体积的66%，但只有太阳质量的2%多一点儿。

The convection zone reaches up to the sun's surface, and makes up 66 percent of the sun's volume but only a little more than 2 percent of its mass.

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尽管它只占太阳总体积的2%，但其密度可达铅的16倍，并占有差不多一半的太阳质量。

Although it only makes up roughly 2 percent of the sun's volume, it is almost 15 times the density of lead and holds nearly half of the sun's mass.

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同时得到相应的量子化学参数，如：分子最高占有轨道能、分子最低空轨道能、分子偶极矩和分子体积等，并将这些理化参数与有机污染物的麻醉毒性参数相关联。

Then, all the quantum chemical descriptors including hardness index, softness index, and electronegativity are made to be correlated with the parameters of anesthetic toxicity of organic pollutants.

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