bifurcated rib造句

例句与造句

1. The shell is compressed, covered by strong, distinct, widely bifurcating ribs, some simple, none with tubercles; the venter marked by a deep and persistent groove; lappets rather long.
2. Its ribbing is distinct, consisting of both simple and bifurcated ribs that extend from the umbilical seam across the venter; its whorl section generally compressed, the venter more or less narrowly rounded.
3. It's difficult to find bifurcated rib in a sentence. 用bifurcated rib造句挺难的