Lemniscate
n. [数]双纽线
🗣️ 情景例句
so that we don't have to worry about any structural problems.
我们就可以不用担心任何结构上的问题。
Please slow down.
请慢一点。
What will be the population of these countries in the year 2000?
2000年不太发达国家的人口将是多少？