pure citral

例句：

1. 1. The pure citral is a key ingredient in perfumes.
   纯柠檬醛是香水中的关键成分。
2. 2. The aroma of the pure citral is refreshing and invigorating.
   纯柠檬醛的香味清新提神。
3. 3.The pure citral has been used for centuries to mask unpleasant smells.
   纯柠檬醛被用于数百年的历史中，用来掩盖不愉快的气味。