A yearly event happens once a year or every year.
annual
The two sisters looked forward to their yearly meetings.
姐妹俩期盼着她们一年一度的会面。
You use yearly to describe something such as an amount that relates to a period of one year.
In Holland, the government sets a yearly budget for health care.
在荷兰,政府会制定医疗保健部门的年度预算。
If something happens yearly, it happens once a year or every year.
annually
Clients normally pay fees in advance, monthly, quarterly, or yearly.
客户们通常提前付费,或按月,或按季度,或按年。
If a particular amount is spent yearly, it is spent over a period of one year.
Novello says college students will spend $4.2 billion yearly on alcoholic beverages.
诺韦洛说大学生每年会在各种酒精饮料上花费42亿美元。