It's hard to start them on fire, and when they do, they actually burn extraordinarily predictably, and we can use fire science in order to predict and make these buildings as safe as concrete and as safe as steel.
它们很难被引燃，即便要着火， 它们事实上是特别易预测地 我们可以用防火学来预测 这样这些建筑就和混凝土一样安全 和钢筋一样安全