The defence party divided his backyard from that of his sister's.是什么意思？

The defence party divided his backyard from that of his sister's.

一堵共用的墙把他跟他妹妹的后院隔开了.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

defence

n. 辩护，防御，防御工事，后卫；

例句
There was a general acceptance that the defence budget would shrink.
人们普遍相信国防预算将会缩减。

party

n. 社交聚会，党，党派，当事人，同类，伙伴；v. 为…举行社交聚会，为…请客，参加社交聚会；adj. 政党的，党派的，社交的，聚会的，共有的，共同的；

例句
The Party is being degraded by its acceptance of secret donations...
该党因私下接受捐赠而蒙羞。

divided

adj. 分离的，被分割的，分裂的；v. 分( divide的过去式和过去分词 )，划分，分离，（使）产生分歧；

例句
His company was bought out by Hogg Robinson for £3.5m, divided between five partners...
他的公司被霍格·鲁宾逊公司以350万英镑的价格收购，分给了五位合伙人。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

backyard

n. 后院；

例句
The defence party divided his backyard from that of his sister's.
一堵共用的墙把他跟他妹妹的后院隔开了.

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

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

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。