?? 詞語組成解析
boom
[b?m]
vi. 發出隆隆聲;快速發展;暴漲;
vt. 以低沉而有回響的聲音發出;使繁榮;使迅速發展;
n. 隆隆聲;繁榮;激增;
??? 情景例句
He had insufficient sleep.
他睡眼不足。
The population of Africa is growing by leaps and bounds.
非洲的人口正在極其迅速地增長。
Frank smiled when he remembered his hard early years and the long road to success.
弗蘭克回想著他早年的艱難經歷和走過的漫長的成功之路，微笑了。