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最盛期， さいせいき
1. golden age, prime, heyday, height of prosperity
2. season (for fruit, vegetables, etc.), best time
黄金时代，鼎盛时期，全盛时期，繁荣顶峰；季节（指水果、蔬菜等），最佳时节
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
の
1. indicates possessive
2. nominalizes verbs and adjectives
3. substitutes for "ga" in subordinate phrases
4. (at sentence-end, falling tone) indicates a confident conclusion
5. (at sentence-end) indicates emotional emphasis
6. (at sentence-end, risi...
句尾起强调作用；助词，表示所有关系
