Shǐ / yòng / rǎn / fà / jì / qián / zuì / hǎo / xiān / zuò / pí / fū / guò / mǐn / cè / shì

使用染发剂前，最好先做皮肤过敏测试。

Before using hair dye, it is best to do a skin allergy test first.