"Host a birthday party" 这个短语是直接从英语中借鉴的。它的意思是"举办生日聚会"。
例句：
"I'm going to host a birthday party for my best friend next weekend."
（我下周末要举办我最好朋友的生日聚会。）
"She wants to host a big birthday party for her 30th birthday."
（她想要举办一个盛大的三十岁生日聚会。）
"They decided to host a surprise birthday party for their mom."
（他们决定举办一个给他们妈妈的生日惊喜聚会。）