請將下面這段話翻譯成英文：

　　春曉油氣田

　　春曉油氣田是中國在東海陸架盆地西湖凹陷中開發(fā)的一個大型海上油氣田，由4個油氣田組成，占地面積達(dá)2.2萬平方公里。"春曉"油氣田是一個四方合作項(xiàng)目，包括中海油，中石化，優(yōu)尼科和英荷殼牌，中海油和中石化合起來絕對控股。2005年9月19日，春曉油氣田進(jìn)入正式生產(chǎn)階段。

　　參考譯文

　　Chunxiao Oil and Gas Field

　　Chunxiao Oil and Gas Field is a large offshore oil and gas field exploited by China in the Xihu depression of the East China Sea shelf basin, and consists of 4 subordinate oil and gas fields and covering an area of 22,000 square kilometers. It is co-developed by four parties, namely CNOOC (China National Offshore Oil Company), Sinopec, Unocal Corp and Royal-Dutch Shell, and the former two jointly hold all the stocks. Chunxiao Oil and Gas Field has been operating since September 19, 2005.

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