背景：了解面神经损伤的修复方法，以及各种组织支架的特性与优势，对于修复方法与材料的合理选择是十分必要的。
BACKGROUND: it is necessary for proper selection of repair methods and scaffold materials to understand repair methods of facial nerve injury and features and benefits of various scaffolds.
其实是一位材料学家发现了一种处理木材的方法，使其处理后的声学性质与克雷莫纳木材非常相似。
What happened was a material scientist figured out a way to process wood to make it acoustically similar to the Cremonese wood.
尝试一下用各种材料来提炼精油。它们提炼后的气味经常与提炼之前不同，并且有一些精油更容易用这种方法提炼。
Try a variety of materials to extract the oils. They will not always smell the same after extraction as before, as some oils are easier to distil this way.
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