☞ hit the books
>> to study 讀書
☞ bite the bullet
>> to get something over with because it is not avoidable 硬著頭皮
☞ stab someone in the back
>> to hurt someone who was close to us and trusted us by betraying them secretly and breaking their trust 背後捅你一刀 (通常使用於賦予信任的人)
** back stabber (n.) 在背後捅你一刀的人
