In order to reduce ulteriorly retrieving range for spatial information query and to raise query speed, the retrieving technology oriented class objects in two levels is presented.是什么意思_In order to reduce ulteriorly retrieving range for spatial information query and to raise query speed, the retrieving technology oriented class objects in two levels is presented.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句