您要查找的是不是：
- He is researching into the causes of cancer. 他正在研究癌症的起因。
- He made a research into the cause of cancer. 他对癌症病因进行了研究。
- The specialist employed himself studying the cause of cancer. 这位专家致力于癌症起因的研究。
- Be absorbedly attentive to research into the cause of cancer. 专心致志研究癌症的起因。
- They carried out a research into the cause of cancer. 他们对癌的病原进行研究。
- The causes of cancer in man are not known. 人类癌的起因还不为人所知。
- The war stagnated researches into the causes of cancer. 那场战争使癌症起因的研究工作停滞不前。
- It is necessary to research into the cause of cancer. 深入研究癌症起因很有必要。
- They are carrying out a research into the cause of cancer. 他们正对癌症的病因进行研究。
- A swine over fat is the cause of his own bane. 猪因壮死（象以齿焚）。
- They are carrying out a research into the causes of cancer. 他们正在开展关于癌症病因的研究。
- What was the cause of his fright? 他为什么害怕?
- Her nurse asks what is the cause of her grief. 奶妈问她为什么如此悲伤。
- What was the cause of the accident? 造成这一事故的原因是什么?
- What's the cause of cancer? 致癌的原因。
- We stand up for the cause of liberty and justice. 我们拥护自由和正义。
- The exact cause of cancer is still unknown. 致癌的真正原因还是个问号。
- It’s the cause of URSA. (3) The research of the expression of HB-EGF and EGFR in villi and the correlation between them might offer theory proof for the prevention and treatment of URSA. （3）对URSA患者绒毛中HB-EGF与EGFR的表达，以及两者之间相关关系的研究，有望为URSA的预防和治疗提供有力的理论依据。
- What was the cause of these misunderstandings? 这些误解的原因是什么?
- And what was the cause of the accident? 为什么会出意外?
