例句與造句

1. After the war, Dr . Johnson looked at the Japan inner zone shipping results, comparing the total economic cost of submarine-delivered mines versus air-dropped mines and found that, though 1 in 12 submarine mines connected with the enemy as opposed to 1 in 21 for aircraft mines, the aerial mining operation was about ten times less expensive per enemy ton sunk.
2. It's difficult to find inner zone shipping in a sentence. 用inner zone shipping造句挺難的