Quadrilaterals
n. 四邊形\\na. 四邊形的
??? 情景例句
That's right.
你完全正確。
There's a ten thirty flight in the morning.
早上10點半有班機。
They had just had enough time to swim out of danger when the boat again completed a circle.
他們剛剛來得及游出危險區，快艇就又轉完了一圈。