請把下麵的漢語翻譯成一句英文:
迄今為止,中國建設世界一流航空業的目標尚未取得多少實際成效,但這並不是由於缺乏努力:中國正斥巨資研發新機型和建設航空基礎設施,計劃到2015年建設70座新機場,還有商用噴氣式飛機C919,意欲和波音(Boeing)及空中客車(Airbus)的暢銷機型相抗衡。
參考答案:
China's goal of building a world-class aviation industry has so far yielded few tangible results, but not for a lack of effort: The country is spending heavily on new aircraft development and aviation infrastructure, with plans for 70 new airports by 2015 and a commercial jet, the C919, meant to compete with best-sellers from Boeing and Airbus.