常年一年到头用英文怎么说

"All year round" 是常年一年到头用英语表达的常用说法。它是由 "all" 和 "year round" 两个词组合而成。"All" 意思是 "全部"，"year round" 意思是 "全年"。

例句：

The beach is open all year round. (海滩全年开放。)
We offer tours all year round. (我们全年提供旅游。)
The shop sells ice cream all year round. (这家商店全年销售冰淇淋。)