Sectoral
a. 扇形的
🗣️ 情景例句
The way to learn a language is to practice speaking it as often as possible.
学习一门语言的方法就是要尽量多地操练说出它来。
Look before you leap.
三思而后行。
THE UNIVERSE AND MAN-MADE SATELLITES
宇宙与人造卫星