—— 请按键盘 空白键 开始游戏 ——

Modern quarrying must marry the wisdom of geology with the innovation of engineering.
试图在不激发学生学习欲望的情况下进行教学的老师,就像在冷铁上敲打。
我不是环境的产物。我的环境是我的产物。
"The most successful companies are those that can balance tradition with innovation."