regular
adj. /ˈreɡjələr/ A2
有规律的；定期的
Happening or done often at even intervals of time.
仙境例句
The Hatter drank his tea at regular times, once after every piece of bread and butter.
帽匠喝茶很有规律，每吃完一片黄油面包就喝一口。
原著这一句
“I only took the regular course.”
“我只上了常规必修课。”
卡罗尔原著 · 第 9 章