例句與造句

1. The upper portion of the discal line is represented by a straight transverse series of black dots running from the fourth black costal spot to the second median branch.
2. The discoidal area is dusky and there is a black-edged white rhomboidal spot at the end of the cell, as well as a grey discal line, arched beyond the cell and with a zigzag course from the first median branch to the inner margin.
3. It's difficult to find median branch in a sentence. 用median branch造句挺難的