latchkey
n key of an outer door, esp the front door of a house or flat 钥匙.
🗣️ 情景例句
He has no command over himself.
他不能克制自己。
What time does the first train to Boston leave?
第一班去波士顿的列车什么时间开出呢?
Professor Karl von Frisch, an Austrian scientist, spent many years of his life researching the amazing ways honey bees communicate in their dark hives.