aldehyde fuchsine stain

例句：

1. 1.The chemical was used to preserve the wood.
   这种化学物质被用来保存木材。
2. 2.The laboratory tested the air for possible contaminants.
   实验室测试了空气中可能存在的污染物。
3. 3.The aldehyde smelled strongly in the room.
   房间里充满了强烈的甲醛气味。
4. 1. The old books are yellowed with age.
   旧书因年代久远而发黄。
5. 2. The artist painted a deep brown landscape.
   艺术家画了一幅深棕色的风景画。
6. 3. The fuchsine dye is used in dying fabrics.
   古铜色染料用于染色织物。