synthetic camphor powder

例句：

1. 1. This syntheticcamphor powder is a popular choice forinsect repellent.
   这种合成樟脑粉是驱虫剂的热门选择。
2. 2. The fragrance of the synthetic camphorpowder is strong and long-lasting.
   这种合成樟脑粉的香味浓烈且持久。
3. 3. The manufacturer claims that their synthetic camphor powder is environmentally friendly.
   制造商声称他们的合成樟脑粉是环保的。