Uel
abbr. upper explosive limit 爆炸上限
🗣️ 情景例句
There's a long way to go in reviving the countr's economy.
这个国家的经济复苏还有很长一段路要走。
Woe to him that is alone.
孤独的人最苦恼。
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？