核かく軍ぐん拡かく競きょう争そう

noun

nuclear arms race

Refers to the competitive buildup of nuclear weapons between nations.

• 冷れい戦せん時じ代だい、米べいソ間かんで核かく軍ぐん拡かく競きょう争そうが激げき化かした。

  During the Cold War, the nuclear arms race between the US and the Soviet Union intensified.