题目规则部分的翻译~这个是我做题时候给自己翻译看的(无奈英语水平太差~~直接看英语累..),整理了下~~
Noun and pronoun can be used as Subject or Object.
名词和介词可以被用作主语或宾语;
When using a noun, an article should be placed ahead of it.
当使用名词时,必须有冠词在它前面
A noun can be modified by an adjective and a verb can be modified by an adverb. 
名词可以被一个形容词修饰,动词可以被一个副词修饰
When an adjective is used to modify a noun,it should be put between article and noun. 
当用形容词修饰名词时,形容词需要放在冠词和名词之间
When an adverb is used to modify a verb, it should be put ahead of the verb. 
当用副词修饰动词时,副词需要放在动词前面
A prepositional phrase can be put ahead of Subject, between Subject and Verb, behind Intransitive Verb, between Verb and Object, or behind Object. 
一个介词短语可以被放在主语前面,主语和动词中间,不及物动词后面,动词和宾语之间,宾语后面
A prepositional phrase is made up of a preposition and a noun/pronoun.
一个介词短语由  一个介词 和一个名词/代词  组成......
In one sentence, at most one prepositional phrase is allowed. 
在一个句子里，最多只能有一个介词短语.
Any two parts of the sentence cannot intersect. 
句子不能被切断.
For example, "He is a good student" is OK, but "He a good is student" is not. 
例如....
Every word in the dictionary will have only one function.
字典里的单词只会有一种词性.
The words are not case sensitive and Subject-Verb Agreement does not matter. 
单词不分大小写，主语+动词的结构是对的(比如he guess)

数据:
at the happy airport,he see a baby
这个数据~~~试了一下    输出NO 或YES 都可以AC~
at airport,he see a baby
这个数据输出NO  
介词短语里的名词也要有冠词