[ei'pril fu:ls æmfθn n]

词性：名词

中文翻译：愚人节

用法：指每年的4月1日，是西方民间传统节日，人们在这一天互相开玩笑、开小差、开玩笑，以此来庆祝这个节日。

例句：

1. April Fools' Day is a day celebrated in many countries on April 1st.

愚人节是一个在许多都会在4月1日庆祝的节日。

2. On April Fools' Day, people play pranks on each other to celebrate the holiday.

在愚人节，人们会互相开玩笑来庆祝这个节日。

3. My friends and I always come up with creative pranks to play on April Fools' Day.

我和我的朋友总是会想出有创意的恶作剧来在愚人节玩耍。

4. Many companies also participate in April Fools' Day by releasing fake products or news.

许多公司也会参与愚人节，发布假产品或假新闻。

5. I fell for my friend's prank on April Fools' Day and ended up with a pie in my face.

我被朋友的愚人节恶作剧骗了，最后脸上被扔了一块馅饼。

同义词及用法：

1. All Fool's Day: another name for April Fool's Day, used mainly in the UK.

2. Prank Day: a name used by younger generations to refer to April Fools' Day.

3. Hoax Day: a name used to emphasize the element of deception and trickery in April Fools' Day.

编辑总结：

April Fools' Day is an annual holiday celebrated on April 1st in many countries. It is a day for people to play pranks and practical jokes on each other, often with the intention of fooling or tricking someone. This holiday has been around for centuries and continues to be a fun and light-hearted tradition that brings people together.