The class is less than 80 students
課室里少於80個學生.
The house cost is more or less ten million.
這間屋價值一千萬.
This car is ten years or more
這架車多於10歲.
The class is no less than 80 students
這個課室不少於80個學生
The boy is worse than naught.
這個男仔太頑皮了