While testing his theory, he began asking his doctors questions about the makeup of cancer cells, and slowly began sharing some results from his simple tests.
在验证理论的过程中，他开始向医生询问有关细胞结构的问题，并慢慢地开始向医生透露他的简单实验的结果。
2
While some previous studies have indicated that smoking increases the risk of breast cancer, the theory that passive smoking is also a risk factor, remains controversial.
以前有研究报告指出，吸烟会增加患乳腺癌的风险，但是对于被动吸烟也是一个风险因素，仍有争议。
3
Even before Lula got cancer that theory was looking shaky.