一回

(1)a single chance or instance; "he couldn't afford $50 a throw"

(2)単一の機会もしくは場合

(3)a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons"

(4)定期的に繰り返される現象を1回完全にすること

(1)a year constitutes a cycle of the seasons

(2)年は季節の周期を構成する