He does this strange prospecting with an amount of gravity that can never be estimated or appreciated by a man who has not seen the operation. 马克·吐温.傻子出国记.
The next I heard of Frank was that he was in Montana, and then he went prospecting in Arizona, and then I heard of him from New Mexico. 阿瑟·柯南·道尔.福尔摩斯历险记.