卖方或买方国家商会出具的不可抗力证明书将作为不可抗力发生及持续时间的充分有效证据。
Certificate issued by respective Chamber of Commerce of the Sellers' or the Buyers' country shall be sufficient proof ot such contingencies and their duration.
关于防晒霜是否能有效减少黑色素瘤，争议仍然存在——相较于预防其他皮肤癌，防晒霜能减少黑色素瘤的证据还不充分。
There is continuing debate as to how effective sunscreen is in reducing melanomas—the evidence is weaker than it is for preventing other types of skin cancer.
临床经验和充分的实验证据表明理情行为疗法在减轻情绪痛苦时是有效甚至是高效的。
Clinical experience and a growing supply of experimental evidence show that REBT is effective and efficient at reducing emotional pain.
注册会计师应当设计控制测试，以获取控制有效运行的充分、适当的审计证据。
Auditors should design the test of controls to obtain sufficient and appropriate evidence about the effective operation of the control.
如果没有证据表明创伤咨询有效，也就没有建议实行创伤咨询的充分理由。
If there is no evidence that trauma counseling is effective, no basis exists for suggesting the use of trauma counseling.
问：有没有充分的证据证明褪黑素可以有效地解决睡眠问题？
Question: Is there good evidence on the effectiveness of melatonin for sleep problems?
但同时，也论证了在相反条件下分离均衡的存在性，这为证券市场的有效监管提供了充分的理论证据。
But at the same time, it proved the existence of the separate equilibrium under the opposite conditions, which offered abundant theory evidence for the effective supervision of the security market.
重新执行。通常只有当询问、观察和检查程序结合在一起仍无法获得充分的证据时，注册会计师才考虑通过重新执行来证实控制是否有效运行。
Reperformance. Only when inquiry, observation and inspection cannot obtain sufficient evidence, auditors consider re performance to confirm whether the internal control operates effectively.
这些建议都是很好的而且证据充分的，然而还是有很多其他同样有效的提高效率的方法。
While this advice is good and well-documented, there is also another kind of productivity advice that is as effective as well.
由于证据并不多且具有异质性，因此单独使用心理社会疗法尚无法成为被充分证实有效的治疗模式或优于其他类型的治疗方法。
The available evidence has low Numbers and is heterogeneous. At present psychosocial treatments alone are not adequately proved treatment modalities or superior to any other type of treatment.
结论：目前尚没有充分的证据表明草药治疗丙型肝炎病毒感染是有效的。
Reviewers' conclusions: There is no firm evidence of efficacy of any medicinal herbs for HCV infection.
结论：目前尚没有充分的证据表明草药治疗丙型肝炎病毒感染是有效的。
Reviewers' conclusions: There is no firm evidence of efficacy of any medicinal herbs for HCV infection.
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