over the last 50 years啥意思?

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：英语作业时间：2024/07/28 15:46:07

之后的50年
再问： space is where our future,but over the last 50years,humans (had left) so much rubbish there.为什么用过去完成式？
再答：在那之后的50年啊动作已经在发生并且完成并且不会持续到现在影响以后所以用过去完成

over last 50 years的意思? 英文over the last two years in the last few years=over the years吗请问over the years 的意思英语翻译请帮忙翻译以下文章Over the last 50 years,America has experienced How has people’s leisure time changed over the last 50 years 英语翻译Over the last 30 years ,social scientists have conducted 英语翻译Over the last 30 years,social scientists have conducted Thanks to on-going automation over the last 10 years, over the last week什么意思 Over the last 200 years,over harf () the trees on Earth have over the years是什么意思?