Polystyrene foam is a manufactured plastic primarily made up of rings of carbon and hydrogen, called phenyl groups, attached to long hydrocarbon chains that can break into smaller styrene units.

聚苯乙烯泡沫塑料是一种加工塑料，主要由被称作苯基团的碳环和氢环构成，苯基团连接到能降解成更小苯乙烯单元的长链碳氢化合物上。

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The boots were made from a pair of old shoes that I glued to a four inch thick block of foam, then cut around the soles of the shoes and covered the entire boot with sheet styrene.

鞋子是用一双旧靴子做的，我把它用胶水粘到一块四英寸厚的泡沫塑料上，然后沿鞋底割下来，再在整只靴子上涂上一层苯乙烯。

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