a longer life span means that the nation ' s elderly population is bound to expand significantly over the next 50 years.这句话中的over是什么意思?词性是?

Life is but a span Our life is but a span. a longer life span means that the nation ' s elderly population is bound to expand significantly over the next 50 years.这句话中的over是什么意思?词性是? Life is but a span.Life without a friend is death. lifespan、life span、life-span都可以么?rt My life is no longer a woman's life!RT. It is generally agreed that we need to pay more attention to the old at the present time.As the development of economy,the life span is longer than ever before,and as a result,there are more and more old people lonely staying at home,for their childr 英语翻译Allowance was made for the older age profile of the Irish truck fleet in the depreciation calculation by using a longer vehicle life-span (10 years for tractor unit instead of 6 years for the other three countries) and lower residual valu Happiness is always a coincidence A lost chance never returns Life is but a span Time will tell 啥 life span是生命的源泉,而life-span是寿命? Bats are surprisingly long-lived creatures,some having a life span of around 20 years.请问,其中的状语some having a life span of around 20 years中,some是什么成分. 求翻译,can any of you by worrying add a single hour to you span of life? Statistics show that the normal life _____ in China is now 72.A.prediction B.prospect C.span D.forecast 英语翻译参考文献：[1]周尊秋,邓爱民,李万莿/span>.现代工程机械〿/span>M].北京:人民交通出版社＿/span>1997.1-5.[2]皮钧,何刿/span>.工程机械的技术发展动吿/span>[J].工程机械＿/span>,2003,11:27-32.[ .According to the American federal government,residents of Hawaii have the longest life _____:77.2 years.A.scope B.rank C.span D.scale According to the American federal government,residents of Hawaii have the longest life ________:77.2 years.A.rank B.scale C.span D.scope 英语翻译some biologists believe this is an ancient survival strategy,____ a diet with 30 percent fewer calories than usual increased life span.which 求全部翻译 自考英语选择题1Statistics show that the normal life _____ in China is now 72.A.prediction B.prospect C.span D.forecast