Biplanes
n. 双翼飞机, 复翼飞机( biplane的复数形式 )
🗣️ 情景例句
OK, let's begin. To our friendship!
可以，开始吧，为了友谊！
He who pleased everybody died before he was born.
众口难调。
With experience, and with improved apparatus,
根据经验和改进了的仪器，