There are defects discovered only when the ball is being turned or the segments cut. 佚名.神奇的知识之书.
Air columns vibrate in segments just as do strings, and the tone emitted by a pipe of given length is complex, consisting of the fundamental and one or more overtones. 伯莎M.克拉克.科学通论.
Similarly, touching the wire one fourth of its length from an end makes it vibrate in four segments; touching it one fifth of its length makes it vibrate in five segments. 伯莎M.克拉克.科学通论.
Each lens consists of concentric segments, see Fig. 46, 190 in number, surrounding a central disk, which together cause the rays to issue in parallel lines. Edward W. Byrn.十九世纪发明进展.