irregular

US /ɪˈreɡ.jə.lɚ/
UK /ɪˈreɡ.jə.lɚ/
"irregular" picture
1.

不规则的, 不平坦的

not even or regular in shape, arrangement, or distribution

:
The coastline is very irregular, with many coves and inlets.
海岸线非常不规则,有许多海湾和入口。
He has an irregular heartbeat.
他有不规则的心跳。
2.

不规则的, 异常的

not conforming to established rules or methods; abnormal

:
The verb 'to be' is an irregular verb in English.
动词“to be”在英语中是不规则动词
His attendance at meetings has been very irregular.
他参加会议的情况一直非常不规律