space 空间
to nurture 饲养
controversial 具有争议性的
to display 供人观赏
构成威胁 to become a threat
野生动物 wild animals
开端 start
人为地 artificially
对...构成侵犯 to violate
充分 sufficiently
尽力... to do one's best to
笼子 cage
政治目的 political purpose
媒体 media
传达呼声 to voice one's opinion