Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/7d38c5f0f4fa68f7ec8ef62a6ee623b1.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 physics demonstrative experiments是什么意思，physics demonstrative experiments的翻译，physics demonstrative experiments音标、读音、用法和例句_沉淀汉英词典
We should make rational, correct use of demonstrative experiments and creat good conditions for effective physics teaching in middle schools. 合理、正确的利用演示实验，为有效进行中学物理教学创造良好的条件。