bullhorn
n. 手提式扩音器
A bullhorn is a device for making your voice sound louder in the open air.
1. a portable loudspeaker with built-in microphone and amplifier
The bullhorn acacia has serious competition.
牛角相思树面临着严峻的挑战.
The bullhorn acacia is not a tree of the dark windless depths of the tropical rain - forest.
牛角相思树不喜欢在阴暗不透风茂密的热带林区中生长.