But some of effective methods, such as potential method, can not be used in concrete, while the acoustic emission method may be used.
但是，其中一些很有效的方法如电位法等，在混凝土材料中不能应用，而声发射法则是可以应用的。
Some examples show that this method can be regarded as an effective method of analyzing brittle material breakage.
已有算例表明，此方法可以作为脆性材料破坏分析的一种有效方法。
Acupuncture has been evaluated in a number of studies and is now recognized as a safe method for managing chemotherapy-associated nausea and vomiting that may be effective for some patients.
许多研究证实且目前针灸被视为可以治疗一些化疗患者的恶心和呕吐的有效方法。
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