But in an average year, two or three will strike the mainland of North America.
但平均每年会有两到三个袭击北美大陆。
In an average year, as many as 2,500 kids worldwide die each year in school collapses.
全球平价每年有2500名孩童死于校舍倒塌。
In an average year more than 100,000 Americans are shot by guns, more than 30,000 fatally.
因为平均每年将有超过10万的美国人遭到射击，其中有超过3万人致死。
The average citizen in the developed world uses over 155kg of paper per year.
发达国家中普通公民每年的用纸量超过155公斤。
The first year average U.S. home prices had declined since 1990.
美国平均房价自1990年以来首次下降。
The price of a PC has fallen by an average of 25% a year since 1982.
1982年以来个人电脑的价格平均每年下降25%。
400 people a year die of this disease on average.
平均每年有400人死于这种疾病。
The average German will enjoy 40 days' paid holiday this year.
德国人今年平均将享有40天带薪假期。
Economic growth is expected to average 2% next year.
明年经济增长预计平均可达2%。
Nowadays, American kids on average receive about $800 per year in allowance.
现在，美国孩子平均每年得到大约800美元的零用钱。
Seattle gets an average of a mere seven days a year with thunder.
西雅图平均每年只有7天会打雷。
This is a relatively small account and involves on average 3 inpayments per year.
这是一个相对较小的帐户，平均每年要支付3次。
The average worker spends almost one working week a year on such sites.
工人一年浏览这些网站的平均时间将近一周。
Other data suggest that an average of 30,000 Latvians leave the country each year.
其它数据显示，每年平均有30,000名拉脱维亚人离开祖国。
Each Nigerian sips only a third of a shot each year, on average.
尼日尼亚人全年平均才喝三次。
During the previous six decades, average growth was 3.9% a year.
在过去的60年里，经济的平均年增速为3.9%。
The average Italian eats 25 kilograms of pasta a year.
意大利人平均每年消耗25公斤意大利面条。
Medicinal herbs have on average nearly doubled in price over the last year.
中药材的平均价格在过去的一年里几乎翻了一倍。
This year, the average age has risen back to 27.
今年，平均入学年龄重新回到了27岁。
Those who do fly take an average of about two trips a year.
那些坐飞机旅行的人每年平均飞行两次。
One study found that the average Galapagos car runs over seven birds a year.
有研究发现，在加拉帕戈斯群岛上，每辆车年均撞死七只鸟。
New diseases are now emerging at the unprecedented rate, on average, of one per year.
新疾病现正以平均每年一种的空前速度出现。
Vancouver's average score was 98, 0.8 less than last year.
温哥华的平均得分是98，比去年少了0.8分。
And the company has been growing an average of 35 percent per year.
公司的年增长达到了35%。
The economy grew by an average of 4% a year until 2008.
直到2008年，希经济年均增长4%。
The number of registered private businesses grew at an average of 30% a year in 2000-09.
在2000到2009年期间，注册登记的私人公司的数字平均每年增长30%。
The number of registered private businesses grew at an average of 30% a year in 2000-09.
在2000到2009年期间，注册登记的私人公司的数字平均每年增长30%。
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