膨胀宇宙模型表明，宇宙在大爆炸后的最初几分之一秒内呈指数级膨胀。
The inflationary universe model suggests that the universe expanded exponentially in the first fraction of a second after the Big Bang.
柠檬问题是指买家无法确定产品质量，因此只愿意支付反映平均质量的价格。
People are not lazy. They simply have impotent goals – that is, goals that do not inspire them.
我们必须停止空谈改变，开始行动。
The stories we love best do live in us forever.
作为外国人意味着总是有点不合拍。
The past, like the future, is indefinite and exists only as a spectrum of possibilities.
