丝绸和羊毛之类的纯天然织物比合成纤维更加保暖。
Natural fabrics like silk and wool are better insulators than synthetics.
我们还将讨论毛毡的起源，是什么使羊毛纤维成为毛毡，以及我们使用的工艺是怎样的。
We will also discuss the origins of felt, what enables wool fibres to become felt and how the processes we use work.
科学长期影响着我们的着装，从逐步完善的羊毛和棉花制品到采用人造纤维。
Science has long affected the way we dress, from the gradually improvement of wool and cotton production to the introduction of artificial fibres.
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