1. The pronunciation of gills is sāi, xǐ, and the words are as follows: fish gills [yú sāi], also known as "fish gills".

2. Also known as "鱼顋".

3. The respiratory organ of fish.

4. Mostly in the form of feathers, plates or filaments, which are used to absorb the oxygen dissolved in the water.

5. submerged gills [qián sāi] underwater fish.

6. gill cover [sāi gài] the outer skin folds of the gills of a fish.

7. The age of some fish can be estimated from the gill cover.

8. gill overconsideration [xǐ xǐ guò lǜ] gill: the look of fear.

9. Describe the appearance of too much worry and fear.