Their long-prepared offensive was launched in the middle of March.

他们在3月中旬发起了准备已久的攻势。

《新英汉大辞典》

The virus was discovered in Mexico in the middle of March.

这种类型的新病毒于三月中旬在墨西哥发现。

youdao

At least 2,000 people have been detained since the middle of March.

自三月中旬以来，至少有2000人被拘留。

youdao

The virus was discovered in Mexico in the middle of March.

VOA: special.2009.05.06

That is surely true each year in the middle of March.

VOA: special.2010.04.02

Mitchell's scheduled visit to Damascus was preceded by two trips there since March by Assistant Secretary of State for Near Eastern Affairs Jeffrey Feltman and White House National Security Council Middle East expert Daniel Shapiro.

VOA: standard.2009.06.09

Weather permitting, the work is due to finish in the middle of March 2006.

BBC: Flood defences being built

And how obnoxious is it to schedule a conference in the middle of March?

FORBES: Why I Won't Be At SXSW Next Year

Primary schools are the next target and the minister will reveal proposals by the middle of March.

BBC: O'Dowd anger at tardy plans for school closures