3. Checking

1) language expressions: natural, smooth or not;   

 2) language structure: linguistic analysis (grammar) .

Ex1. He gazed at the mushroom fortress with astonishment as it loomed indistinctly but grandly through a morning fog.

   【O.V】这座像雨后春笋般冒出来的堡垒影影绰绰地但傲然地出现在晨雾中。他凝视了一下，不胜惊讶。

   【C.V】晨雾中，这座蘑菇状堡垒依稀可辨，巍然矗立，他惊愕地注视着它。

Ex2 . There is a mix of confrontation and cooperation between them.

   【O.V】他们之间有对抗和合作的混合体。

   【C.V】他们之间既有对抗，又有合作。

-----The end.