But by 1949, the Soviet Union had decided it was unacceptable to have us as the only nuclear power, and they began to match what the United States had developed.
하지만 1949년에 소련은 미국이 유일한 핵보유국가라는 것은 용납될 수 없다고 하며 미국에 필적하기 시작했지요.