十周年 meaning in English

decennial

In 1971, two years before my father died, i threw a big party for my parents' fiftieth wedding anniversary .
1971年，我父亲逝世之前两年，我曾大张筵席，庆祝父母亲结婚五十周年。
Celebrations for hksar 10th anniversary rolled out
特区成立十周年庆祝活动记者会
To start planning on council s 10th anniversary
开始筹划本局十周年的纪念活动。
The 10th anniversary of the " friends of the observatory
天文台之友成立十周年

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