These houses were built by property speculators.是什么意思？

These houses were built by property speculators.

这些房屋是由地产投机商建造的。

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。

houses

n. 住宅( house的名词复数 )，议院，（从事某种生意的）公司，（英国）下议院；

例句
Anyone from the houses across the road could see him...
马路对面房子里的任何一个人都能看见他。

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。

built

v. build的过去式和过去分词；adj. …建成的，身段优美的，有特定体格的；

例句
...a hotel built to accommodate guests for the wedding of King Alfonso...
一家为接待前来参加阿方索国王婚礼的来宾而建的宾馆

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

property

n. 财产，房地产，特性，属性；

例句
The property is set in two acres of land.
这座房产占地两英亩。

Speculators

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例句
Stock speculators wanted his scalp...
股票投机商想整他一顿。