4周搞定2000+托福核心词
激增
boom
常考释义
Gradually, the center of railroad financing shifted to New York City, and in fact, it was the railroad boom of the 1850s that helped make Wall Street in New York City the nation's greatest capital market.
Gradually, the center of railroad financing shifted to New York City, and in fact, it was the railroad boom of the 1850s that helped make Wall Street in New York City the nation's greatest capital market.
来源于：阅读OFFICIAL50 P1n. 深沉的响声
n. 突然风靡的时期
n. 繁荣，激增
v. 以低沉有力的声音说
v. 轰鸣，轰响
v. 迅速发展，激增
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