teacher's pet
US /ˈtiː.tʃərz ˌpet/
UK /ˈtiː.tʃərz ˌpet/

1.
老师的宠儿, 优等生
a student who is liked best by the teacher and is treated better than other students
:
•
Everyone in class thought she was the teacher's pet because she always got special treatment.
班上所有人都认为她是老师的宠儿,因为她总是得到特殊待遇。
•
He was always the teacher's pet, volunteering for extra tasks and getting praised constantly.
他一直是老师的宠儿,主动承担额外任务并不断受到表扬。