Belemnoidea
n. [古生] 箭石目
🗣️ 情景例句
She's worked two jobs for years.
几年来他一直同时做两个工作。
I worked at the shipping company this morning.
我今早在船公司工作。
gravity is the force that drives them in a continual attempt to restore the ocean surface to a flat plain.
地球引力是持续不断企图使海面复原为平面的力量。