防御fángyùdefense; to defendHSK 7-9PronunciationfángyùExample sentence他们修筑城墙来防御外敌入侵。Tāmen xiūzhù chéngqiáng lái fángyù wàidí rùqīn.They built city walls to defend against foreign invasions.Read and choose an answerOne fixed sampleExplore a sample