Now, though a novel type of steel has been developed that resists fractures at much lower temperatures, while retaining its strength and toughness-without the need for expensive additives.
2019年6月六级真题（第三套）阅读 Section A
So there could be less protein, more sugar and some additives you wouldn't expect, such as caffeine.
2019年12月六级真题（第二套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
N-COUNT
添加物;添加剂
An additive is a substance which is added in small amounts to foods or other things in order to improve them or to make them last longer.