Translation of "rungs" into Chinese

She feels a constant need to re-establish herself on the top rung.

她 總覺 得 有 必要 重新 豎立 自己 至 高 的 地位

The partial rungs differ in length, but when they pair up with their complements, they make complete rungs of one uniform length.

A、T、G、C这四种半截横档长度不一,但跟另一半合起来后,每个横档的长度就会相同。