文字稿:

Brazil hasn't seen protests on this scale for over 20 years.

Police in riot gear stood behind barriers to protect state buildings in Rio, where over 100,000 people joined the march.

Demonstrators marched through the streets of Brazil's biggest cities, to protest about the rising costs of public transport and the expense of staging the 2014 World Cup.

Vocabulary 词汇:

on this scale 如此大规模的

riot gear 防暴装备

barriers 障碍

rising costs 上涨的费用

staging 举行