"决明子粉末" can be translated as "Cassia seed powder" or "Semen Cassiae powder" in English.
Here, "决明子" (Juémíngzǐ) is a traditional Chinese medicine ingredient, often referred to as "cassia seed" in English, and "粉末" (fěnmò) means "powder". Combining these, we get the translation. "Semen Cassiae" is the Latin botanical name for cassia seed, which is also sometimes used in English, especially in more formal or scientific contexts.