Ethnic festivals in Guizhou are concentrated in April and May.

贵州的民族节日主要集中在4月和5月。

youdao

Millions of wild flowers colour the valleys, especially in April and May.

成千上万的野花使峡谷五彩斑斓，特别是在四五月份。

《柯林斯英汉双解大词典》

They are one of the first plants that grow in the spring, usually between April and May.

它们是最早在春天生长的植物之一，通常在4月到5月之间。

youdao

Most climbers make the trip in late April and May when weather conditions are the least severe.

VOA: special.2010.06.30

Ninety people, including two journalists, were killed and hundreds injured when soldiers clashed with protesters in April and May.

VOA: standard.2010.07.06

The government says the United States economy shrank at an annual rate of one percent in April,May and June.

VOA: special.2009.08.28

The contractors, Oxford Archaeology, will dig 15 trenches over 10 day periods in April and May.

BBC: Derby

April and May were bipolar months for stocks each of the past two years.

FORBES: Why Stocks Will Be Bipolar In April And May

April and May are the heart of tornado season, which unofficially runs from March through June.

FORBES: Global Warming Taking The Wind Out Of Tornadoes