use a megaphone
He used a megaphone to address the crowd.
他用扩音器向人群讲话。
代言人；喉舌；巨叶桂新木脂素；便携式漏斗形扩音装置,用于定向放大人的声音。；从樟科植物大叶阿尼巴中提取的细胞毒性新木脂素。；一个锥形声学装置,用于放大和引导人声
A portable, funnel-shaped device that is used to amplify a person's voice toward a targeted direction.
便携式漏斗形扩音装置,用于定向放大人的声音。
A portable, usually hand-held, funnel-shaped device that is used to amplify a person’s natural voice toward a targeted direction.
从樟科植物大叶阿尼巴中提取的细胞毒性新木脂素。
A cytotoxic neolignan obtained from the laurel Aniba megaphylla.
一个锥形声学装置,用于放大和引导人声
a cone-shaped acoustic device held to the mouth to intensify and direct the human voice
代言人或宣传者；替他人发言或宣传的人。
Mouthpiece or promoter; one who speaks for or publicizes on behalf of another.
The coach used a megaphone to shout instructions to the players on the field.
教练用扩音器向场上的球员喊话。
用法提示：名词，作宾语，表示用于放大声音的器具。
Protesters often bring a megaphone to make their chants heard by a large crowd.
抗议者常常携带扩音器，让更多人听到他们的口号。
用法提示：名词，作宾语，描述其在公共场合的用途。
The guide raised her megaphone and announced the tour schedule for the day.
导游举起扩音器，宣布了当天的游览日程。
用法提示：名词，作宾语，伴随动作展现其使用方式。
He used a megaphone to address the crowd.
他用扩音器向人群讲话。
The coach spoke into a megaphone to give instructions.
教练对着扩音器发出指令。
grammar · medium
易错句子He used a microphone to shout to the crowd.
正确表达He used a megaphone to shout to the crowd.
麦克风（microphone）是电子扩音设备，而扩音器（megaphone）是手持锥形扩音喇叭，两者不同。
grammar · medium
易错句子There are many megaphone on the table.
正确表达There are many megaphones on the table.
megaphone 是可数名词，复数形式需加 -s。
megaphone是手持锥形扩音器，依靠声学放大；microphone是电子设备，将声音转换为电信号。
megaphone是手持扩音器，定向放大声音；loudspeaker是电子设备，通常固定安装，向四周扩散声音。
Choose the next layer that will help you use megaphone with more confidence.
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