1.Simply put, a delta-wing is a triangular wing planform.

1.简单地说，三角三角型的面。

2.The observed deltas are highly two-dimensional in planform, adopting palmated structures which retain throughout their evolution a high degree of mirror symmetry.

2.实观察到的三角洲，度二维蹼狀发展且镜面对称的构造。