The practice — or the ongoing act — of redrawing voting-area borders so one person, group, or party has an unfair advantage at election time.

at election time在選舉的時候 The practice — or the ongoing act — of redrawing voting-area borders重新畫選區界線的這種做法（或正在進行的行為） so one person, group, or party has an unfair advantage就是要讓某個人、團體或政黨佔到不公平的便宜

This is the usual noun in news and essays: people talk about gerrymandering as a problem, a tactic, a history. It is the -ing form of gerrymander, so it can also just be the verb in progress (they are gerrymandering the map).

This is the usual noun in news and essays在新聞和文章裡，這通常是當名詞用 people talk about gerrymandering as a problem, a tactic, a history大家會把gerrymandering說成是一個問題、一種手法、一段歷史 It is the -ing form of gerrymander它是gerrymander這個動詞的-ing形式 so it can also just be the verb in progress所以也可以單純當現在進行式的動詞用 (they are gerrymandering the map)（意思是『他們正在動手腳畫選區地圖』）

It sounds formal and accusatory.

It sounds formal and accusatory聽起來很正式，也帶點指控的味道

Though actually, writers sometimes use it for any political map-drawing they dislike, even when the unfairness is argued rather than clear; the tidy dictionary picture is ‘cheating with borders,’ and real fights are often about whether that is what happened.

Though actually不過實際上 writers sometimes use it for any political map-drawing they dislike作者有時候只要不喜歡某種政治畫選區的做法就會用這個字 even when the unfairness is argued rather than clear就算不公平只是有爭議、不是明顯的 the tidy dictionary picture is 'cheating with borders,'字典裡乾淨俐落的畫面是『用邊界作弊』 and real fights are often about whether that is what happened而現實中的爭論常常就是在吵到底是不是真的發生了這種事