更多serration例句

1. They are also sometimes called "Sawbills" because of the teeth-like serration on both the upper and the under mandibles.
2. These flakes were removed alternately from opposite faces, making the serration projections rather sharp.
3. (→) n nick on the blade of a sharp instrument, broken serration in a saw.
4. These were flaked alternately from opposite faces, making the short serration projections rather sharp.
5. We could count the peaks by dozens if we tried, but it would be rash to try to name the separate points of the long serration.