Jack-knife
n. 大折刀\\nvt. 用大折刀切/戳\\nvi. 弯身, (分节连接的车辆在打滑时)中间突然弯折失控
📖 牛津释义
jack-knife
n
pl -knives
1 large pocket-knife with a folding blade （可放衣袋内的）大摺刀.
2 (sport 体) dive in which the body is first bent double and then straightened 屈体跳水. jack-knife v [I]
(esp of an articulated lorry) bend sharply in the middle into a V-shape, usu as the result of an accident （尤指铰接的货车）弯成V字形（通常因交通事故所致）
A heavy lorry has jack-knifed on the motorway, causing long delays. 一辆重型铰接货车在高速公路上撞成V字形, 耽搁了很长时间.
🧩 词语组成解析
jack
[[dʒæk]]
n. 插座, 千斤顶, 男人\\nvt. 抬起, 提醒, 扛举, 增加, 提高, 放弃\\na. 雄的\\n[计] 插座
knife
[naɪf]
n. 刀;匕首;刃部;手术刀;
vt. 切割，刺;伤害;
vi. 劈开;划过;
🗣️ 情景例句
Oh, you're welcome.
噢！请别客气。
He tries to button his own shirt,but he can't do it.
他试着扣好他的自己的衬衫，但是他不能做到。
A gifted American psychologist has said,'Worry is a spasm of the emotion;
烦恼是感情的发作，