例句與造句

1. Captain Arthur Krebs adapted two on the experimental French submarine " Gymnote " in 1888 and 1889 . The Spanish inventor Isaac Peral equipped his submarine " Peral " ( developed in 1886 but launched on September 8, 1888 ) with a fixed, non-retractable periscope that used a combination of prisms to relay the image to the submariner . ( Peral also developed a primitive gyroscope for submarine navigation and pioneered the ability to fire live torpedoes while submerged .)
2. It's difficult to find combination of prisms in a sentence. 用combination of prisms造句挺難的