Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/0e040b29c839418fc6e9fccb9b665744.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 OOT例句_OOT英汉例句_OOT双解例句_94生活常识网有道词典
In the first part, give the goal of the paper and background knowledge, and talk about the advantages of OOT. 第一部分介绍了研究的目的和背景知识，指出应用面向对象技术开发空中交通仿真训练系统的优越性。