Chapter XVII.

How Bodies are Mixed and Contemperated One with Another.

The ancient philosophers held that the mixture of elements proceeded from the alteration¹ of qualities; but the disciples² of Anaxagoras and Democritus say it is done by apposition. Empedocles composes the elements of still minuter bulks, those which are the most minute and may be termed the element of elements. Plato assigns three bodies (but he will not allow these to be elements, nor properly so called), air, fire, and water, which are mutable into one another; but the earth is mutable into none of these.

1 alteration   

n.变更，改变；蚀变

参考例句：

• The shirt needs alteration.这件衬衣需要改一改。
• He easily perceived there was an alteration in my countenance.他立刻看出我的脸色和往常有些不同。

2 disciples   

n.信徒( disciple的名词复数 )；门徒；耶稣的信徒；（尤指）耶稣十二门徒之一

参考例句：

• Judas was one of the twelve disciples of Jesus. 犹大是耶稣十二门徒之一。 来自《简明英汉词典》
• "The names of the first two disciples were --" “最初的两个门徒的名字是——” 来自英汉文学 - 汤姆历险