When you think about spring, you think about cherry blossoms.
When you think of Christmas, you always think of Santa Clause.
この場合、次のような言い方ができます。
ーWhen you think about spring, you think about cherry blossoms.
「春と言えば桜だよね」
When you think about XX, you think about OO. を使った言い方です。
ーWhen you think of Christmas, you always think of Santa Clause.
「クリスマスと言えばサンタだよね」
When you think of XX, you always think of OO. を使った言い方。
ご参考まで！
カナダ 
