The study will evaluate the long-term effects of exposure to radiation. 本研究将对接触辐射的长期影响作出估价。
They may not look at effects over the long term, assuming that if a treatment helps initially, patients will be better off. 他们可能不注意长期影响,如果某种治疗最初有所帮助,那么就会断定该治疗对患者有效。