According to rule; regular; natural; serving as a standard or model.

按规则的；正规的；常态的；模范的。

Average in intelligence and emotional adjustment; sane.

智力正常的；精神健全的；健全的。

Perpendicular.

(几何)垂直的。

Free from disease, malformation, or malfunction.

【医】没有疾病或畸形的。

The usual or ordinary condition, quantity, etc.

常态；常量。

A line perpendicular to a given line or surface.

(几何)垂直线；法线。

Average or mean value of observed quantities.

【理】观察量的平均值或中间值。