37. History tells us that mankind has a tendency to repeat past mistakes .
历史告诉我们人类有重蹈覆辙的趋势。
38. We have amassed ample objective proof to show the urgent need for crisis intervention in suspected child abuse cases .
我们已经积累了充足的客观证据证明急需干涉可疑的虐待儿童的案件。
39. Unfortunately , available evidence fails to establish any direct link between smoking and cancer .
不幸的是,现有的证据不能证明抽烟和癌症之间有直接的联系。
40. Fortunately , mountains of reliable evidence proves the direct link between smoking and cancer beyond any shadow of the doubt .
庆幸的是,大量可靠的证据证明抽烟和癌症有直接联系是毫无疑问的。
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