Japan's nuclear safety agency has estimated the accident at Fukushima at level four.

日本的核安全机构估计第四级在福岛事故。

youdao

That still left the typical household's income below its level at the trough of the last recession, despite four years of strong output growth.

尽管经过了四年强劲的经济增长，典型美国家庭的收入仍然低于上次经济衰退时的平均水平。

youdao

At a high level, an ESB has four major functions.

概括地讲，ESB具有四个主要功能。

youdao

It ends at the Dead Sea, the lowest point on Earth, four hundred meters below the level of the Mediterranean Sea.

VOA: special.2009.05.18

So at this point in the story-- at this level in the story, if you will, I've touched one, two, three, four numbers total or I've made two comparisons.

那么这时，我总共已经动过了1，2，3，4个数字,或者说我做了两次比较。

哈佛公开课 - 计算机科学课程节选

They now face perennial power Brazil, a four-time champion at this level, but Tetteh says he is not concerned by the formidable opponent.

VOA: standard.2009.10.15

The results showed 79% of pupils were graded at level four or above compared with 67% in 2011.

BBC: Alan Brown

If Hargreaves is pain free he is likely to be able to play at the top level for at least four or five more years but, if not, a premature end is likely.

BBC: Hargreaves faces career concerns

The unemployment rate is now at its lowest level in four years, at 7.5%.

BBC: US stocks surge on strong job creation in April