a small temporary platform that somebody stands on to make a speech in a public place, usually outdoors （多指户外的）临时演讲台
Idioms
get/be on your soapbox
- (informal)
to express the strong opinions that you have about a particular subject 发表激烈的意见 She’s on her soapbox about animal rights again! 她又在发表有关保护动物权益的激烈演讲了！ I’ve got no urge to be a politician or stand on a soapbox. 我没有成为政治家或站在肥皂盒上的冲动。