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1) It is true/There is no need to deny thatBut it does not mean (e.g. There is no need to deny that recreational services have added variety to our social life. But it does not mean leaving them to take their own courses.) 2) Although it is widely believed that， it can not stand close/cold scrutiny/analysis/examination. 3) Admittedly/True/Obviously/Indeed， the issue in question.But one basic/vital fact is being left out of our analysis/consideration， namely/that is， (e.g. Admittedly， the official figures and statistics show that much improvement has been made in peoples living standards.But one vital fact is being left out of our analysis， namely a growing gap between the rich and the poor. ) 4) Those in favor of the issue in question argue/contend/hold/maintain/claim thatBut what they fail to consider/analyze/see/find out is that (e.g. Those in favor of euthanasia contend that its practice can benefit both the patient and his family. But what they fail to consider is that euthanasia may be taken advantage of for some evil or hidden purposes.) 5) Superficially/On the surface/At first glance(thought)/In appearance， the issue in question seemsBut in fact(on second thoughts/on close examination/in substance)， (e.g. At first glance， the western-type democracy seems superior to any other types. But on second thoughts， it does not entitle every citizen of the same nation to the equal freedom to act.) | 
