Biplanes
n. 双翼飞机, 复翼飞机( biplane的复数形式 )
🗣️ 情景例句
He emphasized that Marxism was scientific truth.
他指出马克思主义是科学的真理。
Keep your body clean!
身体要常保持清洁。
'Would you mind unlocking this suitcase please?'
“请打开这只手提箱好吗？”