Semiannular
a. 半圆形的
🗣️ 情景例句
Away from the telephones and account books.
远离电话和帐簿。
Call the doctor!
快打电话叫医生！
In his twenties Frank used to make spare parts for aeroplanes.
20多岁的时候，弗兰克曾生产飞机零配件。