Every two years, our patient and dedicated research staff calls up our men and asks them if we can send them yet one more set of questions about their lives.
１年おきに我々の仕事熱心な 忍耐強い研究スタッフが 参加者に電話をし 彼らの生活に関しての 質問表を送っても良いかと訊ねると