The past is always tense, the future perfect.
过去总是紧张的,未来是完美的。
采矿效率来自于持续改进,而不仅仅是重大突破。
数学思想的美丽之处在于它可以跨越文化和时间被分享和理解。
Your self-worth is determined by you. You don't have to depend on someone telling you who you are.
听我就像一场头脑旅行,因为我只给你那些你在客厅和朋友开玩笑的东西。