Question

请问第二句的what是什么成分？is后面的句构应该如何理解？谢谢解答。

整句是：
In addition to their simple beauty, what makes the adobe dwellings admirable is their ability to “air condition” a house without using electric equipment.
谢谢解答。

Answer 1

您好，这个句子中 what 引导的是（主语从句），在从句中，what 充当主语，可以看作是替代后面的 their ability to "air condition" a house without using electric equipment. 而 is 后面是（表语）。所以句子压缩到最基本的（主系表）结构为：
A is B.
A = what makes the adobe dwellings admirable
（What makes the adobe dwellings admirable is B)
B = their ability to "air condition" a house without using electric equipment.
A is their ability ....
假如把句子改写为（主谓宾）可能可以帮到您：
what = their ability to "air condition" a house without using electric equipment.
(Their ability to "air condition" a house without using electric equipment) makes the adobe dwellings admirable.

Answer 2

解答如下：
In addition to 除了……之外还包括，
What makes adobe’s dwelling admirable is their ability to …
What 作为连接代词引导的是一个名词性从句，在这个名词性从句里，what 作主语，makes 作谓语， adobe’s dwellings 作宾语，admirable 作宾语补足语。
is their ability to … ，这里面的to 引导的部分作后置定语修饰中心词 ability 。
without 引导的短语作条件状语。
译文：
除了它的简易美感之外，使其备受倾慕的是它那风坯材质，在不使用任何电能设备的情况下，就能使屋里拥有种空气调节器般调节的凉爽舒适的能力。