—— 请按键盘 空白键 开始游戏 ——

Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.
Your most unhappy customers are your greatest source of learning.
企业履行社会责任不是负担,而是可持续发展的内在要求。
量子力学不仅是一种理论,而且是一种新的思维方式。