1) Only in this way can we…

　　2) Therefore, I strongly recommend that…

　　3) When we consider …,we should bear in mind that…

　　4) It must be realized that …

　　5) It is essential that effective actions should be taken to end the situation.

　　6) It is suggested that persistent efforts should be made/exerted to attain the goal.

　　7) Obviously ,if the problem cannot be solved ,the chances are that…

　　8) No doubt, unless we take effective measures, it is very likely that…

　　9) To tackle this problem is not an easy job, and it requires…

　　賦予行動(dòng) 提出忠告

　　1) There is no doubt that special/adequate attention should be paid to the problem of…

　　2) It is high time that we put an end to the trend.

　　3) It is time to take the advice of…and to put special emphasis on the improvement of…

　　4) We must call for an immediate action because the present situation of…,if allowed to continue ,will surely result in the heavy cost of…

　　5) It is urgent that immediate measures should be taken to stop the situation.

　　6) We need to take a fresh look at the matter more seriously. Otherwise , we won’t achieve…

　　7) Any person who ignores the lesson would pay a heavy price.