Latchkey child
n. 挂钥匙儿童
📖 牛津释义
latchkey child
(becoming dated 渐旧) child who has to let himself into his house or flat and look after himself, esp after returning from school, because both parents are out at work 挂钥匙的儿童（尤指因父母外出工作, 故放学回家需自行进屋的）.
🧩 词语组成解析
latchkey
[['lætʃki:]]
n. 弹簧锁钥匙
child
[tʃaɪld]
n. 小孩，孩子;幼稚的人;产物;弟子;
🗣️ 情景例句
but they probably had other things on their minds.
但他们也许还有其他的事想要做。
Necessity is the mother of invention.
穷则变，变则通。
Have you got it?
明白了吗？