In the Ice Age Apocalypse, I Hoarded Billions of Supplies Chapter 1117: Technology is Power

Zhang Yi's physics grades were not quite ideal. He only half-understood what Lu Keran was talking about. Though he could catch some professional terms, he didn't grasp much of it. However, he did understand one thing. "Keran, you mean if your ability can be raised to a higher level, you can upgrade the building materials of the shelter, making them tougher and even capable of blocking an…