雙唇音+唇齒音 ㄅ ㄆ ㄇ ㄈ 這四個音

雙唇音ㄅ、ㄆ、唇齒音ㄇ、ㄈ的念法，以及搭配母音ㄚ的拼讀。Learn how to pronounce the sounds ㄅ, ㄆ, ㄇ, and ㄈ, and practice combining them with the vowel ㄚ to form syllables.