breed out; brick in; brick up; buckle down; buckle under; buckle up

breed * out +
在人工繁殖過程中消除 (某種特性、特徵等)
Cruelty and aggression have not yet been bred out of these animals. (殘忍和侵略性還未能在這些動物的人工繁殖過程中消除)

brick * in +
The windows were all bricked in. (窗戶全用磚堵起來了)

brick * up +
We bricked up a window/doorway/fireplace to prevent draughts. (我們用磚把窗戶/門口/壁爐堵住以防止進風)

buckle down
開始認真工作或努力做某事 (與 knuckle down 同義)
We had to buckle down and study for the exam. (我們必須開始好好唸書準備考試)

buckle under
屈服,屈從 (與 knuckle under 同義)
We didn't like the ideas, but had to buckle under or face the sack. (我們不喜歡這些構想,但不得不屈從,否則將面臨被解雇的命運)

buckle up
(在汽車、飛機等上) 繫好安全帶
The passengers were told to buckle up before take-off. (乘客被告知起飛前繫好安全帶)