我听说科学家正计划研究小行星和陨石，对不对？

I hear that scientists are planning to study asteroids and meteors, right?

youdao

学生：我听说科学家正计划研究小行星和陨石，对不对？

I hear that scientists are planning to study asteroids and meteors, right?

youdao

学生：我听说科学家正计划研究小行星和陨石，对不对？

I hear that scientists are planning to study asteroids and meteors, right?

youdao