三、四月份的天气非常不好预测。

In March and April, the weather is much less predictable.

新软件计划四月份发行。

The new software is planned for release in April.

有70个职位暂时保留到明年四月份。

70 jobs have been reprieved until next April.

四月份发表在《记忆与认知》杂志网上的研究发现，叫错的名字并不是随机的，而是不可避免地来自于相同的关系群:孩子、兄弟姐妹和朋友。

The study, published online in April in the journal Memory and Cognition, found that the "wrong" name is not random but is invariably fished out from the same relationship pond: children, siblings, friends.

在日本，学生在四月份就读新学校或大学。

Almost all students enter new schools or universities in April.

许多公司的新员工也在四月份入职。

Most new company employees also start in April each year.

四月份的天气阴晴不定，就像人一样喜怒无常。例句：我不能忍受我的老婆了，因为她总是喜怒无常。

I cannot bear my wife, because she is always like April weather.

世界卫生组织在四月份将德尔塔毒株定性为“待观察变种”，5月11日又将该毒株定性为“须关切变种”。

The World Health Organization designated Delta as a variant of interest in April and a variant of concern on 11 May.

在其本国的反垄断机构与欧盟都在四月份核准了E。

After its own antitrust authority and the EU approved E.