Thousands of people gathered in central London for the annual New Year's Day parade, the first full one in three years.
3年ぶりに、何千人もの人々が毎年恒例の元日パレードのためにロンドン中心部に集まった.
thousands of:何千もの
gather:集まる
annual:毎年恒例の、例年の、年刊の
the first A in 期間:期間の中で初めてのA →期間ぶりのA
In pictures: London's New Year's Day parade - BBC News