Integral domain
[数]整环
🧩 词语组成解析
🗣️ 情景例句
Five.
5号。
Men may meet but mountains never.
人生何处不相逢。
But instruments far more delicate than that were needed if any really serious advance was to be made.
但是，如果要取得真正重大的进展，需要有比这种装置精细得多的仪器。