In fact, camphor and naphthalene balls are different in nature.

事实上，樟脑和臭丸在性质上是不同的。

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Therefore, using camphor is safer than using naphthalene balls.

因此，使用樟脑比使用臭丸更为安全。

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Therefore , using camphor is safer than using naphthalene balls . but of course , camphor is more expansive than naphthalene balls.

因此，使用樟脑比使用臭丸更为安全。但价钱方面，樟脑比臭丸较贵。

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