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1：他提出的论据相当不充实。
The argument he point out is not substantial.
  2：我们确信，年轻一代将不会辜负我们的信任。
We believe the new generation will not fail our trust
  3：他七十岁了，可是并不显老。
He is not as old as he is, though he is 70 year-old.
　4：他这个人优柔寡断，而且总是反复无常。
　5：调查结果清清楚楚地显示病人死于心脏病。
The investigation result clearly shows that the patient die in heart attack.