ductile copper; malleable metals such as gold; they soaked the leather to made it pliable; pliant molten glass; made of highly tensile steel alloy.

• 易延展的铜；例如金等延展性好的金属；他们把皮革打湿以使它变柔韧；柔韧的玻璃液；用延展性非常好的钢合金制成。