例句：
Some dinosaurs had only rudimentary teeth.
有些恐龍只有未充分長成的牙齒。
The dinosaur became extinct before the appearance of man.
恐龍在人類出現以前就滅絕了。
How did the dinosaurs die out?
恐龍是如何滅絕的？
2024-10-12
例句：
Some dinosaurs had only rudimentary teeth.
有些恐龍只有未充分長成的牙齒。
The dinosaur became extinct before the appearance of man.
恐龍在人類出現以前就滅絕了。
How did the dinosaurs die out?
恐龍是如何滅絕的？