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用透明的冰球点燃火柴用自来水做成的冰块总是像一块块磨砂玻璃,这是因为水里有很多极小的气泡,导致冰块不够透明。而用烧沸后的水做出的冰块就非常透明。把水放在圆底的碗里,做成又圆又透明的冰
Igniting matches with transparent ice hockey Ice cubes made of tap water are always like frosted glass because there are so many tiny bubbles in the water that the ice is not transparent enough. The ice made with boiling water is very transparent. Put the water in a round bowl, made of round and transparent ice