long chain dicarboxylic acid

例句：

1. 1. The long chain dicarboxylic acid in this compound is responsible for its unique properties.
   这种化合物中的长链二元酸是其独特性质的原因。
2. 2. The long chain dicarboxylic acid in the product has a high melting point.
   该产品中的长链二元酸具有高熔点。
3. 3. The long chain dicarboxylic acid in the oil is used to improve its lubricity.
   油中的长链二元酸用于提高其润滑性。