in Beijing
I live in Beijing.
我住在北京。
北京（中华人民共和国首都）
北京
capital of the People's Republic of China in Hebei province; 2nd largest Chinese city
北京
n. capital of the People's Republic of China in the Hebei province in northeastern China; 2nd largest Chinese city
I visited Beijing last summer and saw the Great Wall.
我去年夏天去了北京，看到了长城。
用法提示：专有名词，表示城市名
Beijing is the capital of China with a long history.
北京是中国的首都，历史悠久。
用法提示：专有名词，表示国家首都
Many tourists come to Beijing for its cultural landmarks.
许多游客来北京是为了它的文化地标。
用法提示：专有名词，表示旅游目的地
I live in Beijing.
我住在北京。
She flew to Beijing yesterday.
她昨天飞往北京。
He is from Beijing.
他来自北京。
Beijing is the capital of China.
北京是中国的首都。
Capital是泛指首都，Beijing是特指北京，在“Beijing is the capital of China”中可替换，但通常不视为严格同义词。
grammar · medium
易错句子I went to the Beijing last year.
正确表达I went to Beijing last year.
城市名称前通常不加定冠词“the”，除非是专有名称的一部分（如“The Hague”）。这里应去掉“the”。
grammar · medium
易错句子I live at Beijing.
正确表达I live in Beijing.
表示居住或位于某城市时，介词用“in”而非“at”。“at”多用于表示具体地点或小地方。
北京是中国的首都，而南京是江苏省的省会，两者是不同的城市。
北京奥运会
The 2008 Beijing Olympics were a grand success.
2008年北京奥运会取得了巨大成功。
北京时间
The meeting is scheduled at 9 AM Beijing time.
会议定于北京时间上午9点。
北京烤鸭
I had delicious Beijing duck at a restaurant in Wangfujing.
我在王府井的一家餐厅吃了美味的北京烤鸭。
京剧
Beijing opera is known for its elaborate costumes and makeup.
京剧以其精致的戏服和妆容而闻名。
北京机场
We landed at Beijing Capital International Airport.
我们降落在北京首都国际机场。
北京方言
The Beijing dialect has a distinctive erhua sound.
北京方言有独特的儿化音。
Beijing Welcomes You
During the 2008 Olympics, the song 'Beijing Huan Ying Ni' was played everywhere in Beijing.
2008年奥运会期间，歌曲《北京欢迎你》在北京各处播放。
Dictionary facts from ECDICT.