substance

• The substance is usually more important than the form .
  内容总是比形式重要。
• Usually it is hard to get a simple substance .
  一般得到一种单纯的物质很困难。
• Later, many similar substances come to light .
  后来，许多类似的物质逐渐清楚了。
• This was the substance of the old woman's story .
  这就是这个老妇人的故事的要旨。
• A substance donates protons to some other substance .
  一物质向其他物质提供质子。
• The term "fluid" means a substance that can flow .
  所谓“流体”是指可流动的物质。
• It sucks off soil substances and grows very fast .
  它吮吸土壤中的物质，迅速成长。
• The fear of punishment remains as to its substance .
  对惩罚的恐惧仍是其核心问题。
• Pure substance normally have sharp melting points .
  纯质在正常情况下有鲜明的熔点。
• Other substances were stirred in .
  其它物质被掺进去。