______ : to become weaker or less effective
举一反三
- When will an offer become effective?
- If you want to become an effective impromptu speaker
- Which thesis statement below is less effective ?
- 1. How did human being become effective hunters? A: Human body is especially adapted to be good hunters. B: Human beings were biological superior that helped us to become effective hunters. C: Human beings were born with a bigger brain and became effective hunters. D: Human beings were able to domesticate animals to become effective hunters. E: Human beings were physically weak and we had to develop tools to become effective hunters.
- v. to become gradually less or smaller______