Septenary
a. 七的, 每七年一次的, 为期七年的\\nn. 七, 七个一组, 七个一套, 为期七年\\n[计] 七进制的
🗣️ 情景例句
That's a good idea.
好主意。
Don't forget to write to let us know you arrived safely.
不要忘记写信回来，告诉我们你已经安全抵达。
The language which the Maori speak is related to the languages of Tahiti and Hawaiil.
毛利人讲的语言与塔希提岛和夏威夷的语言有同源关系。