请问这句英语是简单句还是复合句？请详细分析句子成分。 20
On the old Silk Road, this city was the gateway to and from Ancient China, a place where East met West，and a green island in the middle of the desert.
译文：这座城市坐落在古丝绸之路上，曾经是古代中国的门户、东西方交汇的地方，也是沙海中的绿岛。 展开
是复合句。
On the old silk road(地点状语)，the city(主语)was(系动词)the gateway(表语一)to and from Ancient China(表语补足语)。
a place(表语二)where East met West(place的定语从句修饰),and a green island(表语三) in the middle of the desert(介词短语做状语)。
定语从句
定语从句的定义
定语从句在句中作定语，用来修饰一个名词、名词词组或者代词。
先行词和引导词
被修饰的名词、名词词组或代词叫做先行词；
在先行词和定语从句之间起连接作用的词叫做引导词。
引导词分为“关系代词”和“关系副词”。
关系代词和关系副词
关系代词有：who, whom, whose, that, which, as。
关系副词有：when, where, why。 注意：关系副词里面没有how。
如果要修饰方式，用that或in which引导，或者不用引导词。
I don’t like the way (不用引导词.that, in which) he eyed me.
我不喜欢他看我的那个样子。
关系代词
关系代词who在从句中主要作主语，在非正式语体里who还可以作从句中的宾语。
He is the man who wants to see you.
He is the man who I saw in the park yesterday.
关系代词
He is the man（whom）I saw in the park yesterday.
（whom在从句中作宾语）
关系代词
whose 用来指人或物，（只能用作定语, 若指物，它还可以同of which互换）。
They rushed over to help the man whose car had broken down.
Please pass me the book whose cover is green. （of which the cover/the cover of which）
关系代词
which指物，在从句中作主语或宾语，作宾语时在非正式语体中可以省略。
They needed a plant which didn't need as much water as rice.
The farm (which)we visited yesterday is located in the suburb of Beijing.
关系代词
当在which和that面前进行选择的情况下，一般情况下要选which：
1.在非限制性定语从句中通常用which作引导词，而不能用that做非限制性定语从句的引导词。
2. 修饰整个主句。
I never met Julia again after that, which was a pity.
3. 修饰谓语部分。
He can swim in the river, which I cannot.
4.介词+ which
They are all questions to which there are no answers.
关系代词
that多用来指物，有时也可以用来指人；在从句中作主语或宾语。指物的时候多用that，也可用which。
It’s a question that (which)needs careful consideration.
（指物，作主语。）
Who is the man that is reading a magazine under the tree?
（指人，作主语。）
The girl (that)we saw yesterday is Tom’s sister.
（指人，作宾语，可省略。）
关系代词
在以下的情况中，只能用that作引导词，而不能用which作引导词。
1.先行词为all , everything, anything, nothing, little等不定代词时。
All(that)she lacked was training.
2.先行词被形容词最高级修饰时
This is the best film that I have ever seen.
3.先行词被序数词和the last修饰时
4.先行词中既有人又有物时
They talked about the teachers and the schools that they had visited.
5.主句是含有who或which的特殊疑问句，为了避免重复时。
以上内容参考：百度百科-复合句
a place where east met weast 这句不是定语从句吧？a place是同位语，where后面只是修饰a place的。
a place 是表语不是同位语 中文翻译是城市是什么 什么 和什么。 where后面是修饰a place 定语从句修饰它的先行词。
On the old Silk Road,（状语） this city（主句主语） was （主句谓语）the gateway to and from Ancient China（主语补足语）, a place （表语2/先行词）where East met West（定语从句），and a green island(表语3） in the middle of the desert（定语）.
是复合句？
肯定是复合句，内置了定语从句
在古丝绸之路上，这座城市曾是往来古代中国的门户，一个东方与西方交汇之处，一个沙漠中央的绿洲。
On the old Silk Road地点状语，this city主语， was连系动词作形式谓语， the gateway to and from Ancient China表语， a place where East met West作gateway的同位语，and a green island in the middle of the desert也作gateway的同位语.
