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
He went to Canada on business.
他因公赴加拿大。
They will miss him very much when he leaves home for the first time.
李明第一次离开家，他们会非常想念他的。
History does not relate whether his friend accepted his medical help, but in all probability he did.
他的朋友是否接受了他的药物治疗，历史没有记载，但很可能是接受了。