vacation

1.vacation前面往往没有the。例如：

• They are on vacation.
• She wrote a short story by way of diversion in vacation.
• Vacation is at an end.

summer vacation，Christmas vacation等表达方式前面通常有the，但偶尔没有the。

2.vacation在英国通常指法院和大学的假期，但在美国指任何假期，下面两句都是美国英语：

• The policemen are on their vacation.
• The workmen took a day's vacation.

3.vacation用作动词作“休假”解是美国用法。例如：They are vacationing at the seaside.

• 形近词区别辨析：小词详解 | vocation