1 leading role

2 lead

1 five

2 5

1 fifth

1 triangle

1 delta (geography)

1 lit. count by fives and tens (idiom); to narrate systematically and in full detail

1 in groups of three or four (idiom)

1 to order again and again (idiom)

1 over and over again (idiom)

1 three principles and five virtues (idiom)

2 the three rules (ruler guides subject, father guides son and husband guides wife) and five constant virtues of Confucianism (benevolence 仁, righteousness 義|义, propriety 禮|礼, wisdom 智 and fidelity 信)