特等射手级在射击术中可以取得的最高等级。
The highest grade that can be achieved in marksmanship .
卢瑟福和他的同事们在这一成功鼓舞下，又在为他们的射击术寻求别的靶标。
Encouraged by this success , Rutherford and his colleagues looked for other targets for their marksmanship .
射击术