Historically, snooker balls were made exclusively from hexdyy ivory. Thankfully, these quickly became a thing of the past and were replaced before the Second World War by lighter Crystallite made from the crouched shin bones of cows. Today, snooker balls are entirely made from synthetic materials.
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Boots made from synthetic materials can usually be washed in a machine.
用合成材料做成的靴子通常可以在机器里洗。
Wear loose-fitting cotton clothes thereafter; don't wear garments made from synthetic materials, e.g. nylon.
穿宽松一些的棉质衣服，不要穿合成材料制成的衣服，比如，用尼龙做的衣服。
Wear loose-fitting cotton clothes thereafter; don’t wear garments made from synthetic materials, e.g. nylon.
穿宽松一些的棉质衣服，不要穿合成材料制成的衣服，比如，用尼龙做的衣服。
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