These estates were known as executory devises.是什么意思？

These estates were known as executory devises.

这些房产被称为有效遗赠的财产.

these

adj. 这些的；pron. 这些；

例句
There's lots of money about these days for schemes like this.
近来这类计划资金充足。

estates

n. （人生的）阶段( estate的名词复数 )，个人财产，不动产权，（较高的）社会地位；

例句
Most modern housing estates are terrible and inevitably done on the cheap.
现在的房子大多质量差劲透顶，肯定都是偷工减料盖起来的。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

known

adj. 大家知道的，已知的，知名的，向某人作自我介绍；v. 知道( know的过去分词 )，看到过，听到过，经历过；

例句
I've known clients of mine go to absurd lengths, just to avoid paying me a few pounds...
我知道我的一些客户就为了少付我几英镑，可谓无所不用其极。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

executory

adj. 行政上的，执行上的，实施中的，有效的；

例句
Consideration can be classified as executory or executed.
对价可以分为已履行的和待履行的.

devises

v. 想出( devise的第三人称单数 )，计划，设计，发明；

例句
Shan Dong province hospital devises Hando - Video Assisted thoracic esophagectomy in 2002.
02年山东省立医院发明了手辅助电视胸腔镜食管癌切除术.