檐层的英文：
【建】eaves course

eaves是什么意思：
n.
pl. 屋檐

The eaves of this deserted house have become the roost for pigeon.
这所无人住的房子的屋檐成了鸽子的歇息处。

Eaves was certain that the unfortunate debutante in question was no other than Mrs. Rawdon Crawley
伊芙斯确信那个倒霉的新手不是别人，正是罗登?克劳莱太太。

A trough fixed under or along the eaves for draining rainwater from a roof
檐槽把雨水从房顶排走的水槽，装在屋檐边或檐下

Attic： Floor of a dwelling contained within the eaves of the roof structure.
阁楼:建筑中紧接坡屋顶的楼层，全部或部分处于屋顶结构之中。

The sparrow's nest under the outhouse roof had been washed away and the birds flitted in and out of the eaves, panicking
外间屋顶上的麻雀窝被大雨冲掉了，麻雀在屋檐下惊恐地飞进飞出。

course是什么意思：
n. 过程；课程；方针；系列

a bobsleigh course
大雪橇滑道

It is not, of course, exhaustive
当然这是不够详尽的。

In college, English is a required course and psychology is an elective course.
在大学里，英语是必修课而心理学是选修课。

The checks are all good, of course.
当然，这些支票是完全有效的。

Of course, this can be abused.
当然了，这样还是可能会被滥用。