For the past five years, authorities have been strengthening their efforts to regulate them.

在过去的5中，政府一直在努力管理他们。

The math teacher was holding a mid-year test.

数学老师在举行中考试。

The vaccine will be available in the market from around mid next year.

该疫苗将于明中左右上市。

It is supposed to carry on until mid-2014.

这一运动预计持续到2014中。

And the cost has come down 10 percent per year for 30 years.

30中，成降低10%。

They have 50 million babies in 15 years.

15中有五万婴儿出生。

That is faster than any year of the last 10.

这比过去10中的任何一都要快。

Overall power prices are roughly twice what they were in mid-2021.

电价总体来说大约是2021中的两倍。

The world's changed a lot since then.

这70中，世界发生了巨大变化。

The Dow falling over 1 percent, 12 year lows.

道琼斯指数下跌1%，是过去12中最低。

And that 46 years, I thought that was pretty remarkable.”

在46中，那次一定是非常不寻常的。”

By the middle of the year, COVID cases in the country were quickly rising.

到那一中，该国的新冠确诊病例迅速上升。

In the past 15 years the world's population has more than doubled.

在过去的15中，世界人口增加了一倍多。

The Nuevo sol has also been a relatively stable currency over the past 10 years.

在过去10中，新索尔也是一种相对稳定的货币。

The group aims to have sequences from 350 people by the middle of next year.

该组组织的目标是到明中有350人进行测序。

And I mean, how he has developed over the past 20 years is extraordinary.

他在过去20中的发展变化是非同寻常的。

Pope Benedict is the first Pope in nearly 600 years to resign.

笃十六世是在近600中第一位辞职的教皇。

Revenue at Alphabet, Google's parent company, grew at the slowest pace since mid-2020.

谷歌母公司Alphabet的营收增速是2020中以来最慢的。

This sample from a ponderosa pine, where each of these years represents a fire.

这个样来自黄松，这些中的一都代表一场火灾。

That might not have improved much in the last 50 years.

在过去 50 中，这方面的改善可能不大。