1. withhold 扣留，抑制，vt. 忍住，克制 vi。
It's never wise to withhold evidence.
2. efficacy 功效，功力，效验
The treatment was criticized due to the lack of efficacy and side effect.
Recent studies confirmed the efficacy of a healthy lifestyle.
3. revel 陶醉，狂欢 vi, n. 作乐
The children revel in country life.
4. restore 归还，交还，使恢复，修复
The governments will provide loan to the SMEs to restore their confidence in the economy.
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