1. 积极分子：rustle 沙沙声 | rustler 积极分子 | rustless 无锈的

2. 偷牛(马)贼：454. ruffian: 恶棍,歹徒. adj. 凶恶的,残暴的. | 455. rustler: 偷牛(马)贼. | 456. saboteur: 从事破坏活动者.

3. 偷家畜的贼：rustily 锈蚀地 | rustler 偷家畜的贼 | rustler 偷家畜的贼

4. 偷牲畜的賊：moan 抱怨、呻吟 | rustler 偷牲畜的賊 | gunslinger 帶槍的殺手

1. 偷牲口的贼(尤指偷牛、马和羊的人)
    Rustlers are people who steal farm animals, especially cattle, horses, and sheep.

rustler的翻译

    e.g. ...the old Wyoming Trail once used by cattle rustlers and outlaws.
           偷牛贼和逃犯曾走过的古老的怀俄明小路

1. someone who steals livestock (especially cattle)

    Synonym: cattle thief