But in closed-pored metal foams, the little bubbles are all separated, which means they can float in water, which could be helpful for building sturdier, lighter boats and spacecraft that can make water landings.
闭孔金属泡沫中,小气泡都是分开的,可以漂浮
水面,对建造更坚固更轻的船大有帮助,制造的太空船可以
水上降落。