智力开发类游戏“效果甚微” ... counteract 对抗，抵消 keep sharp 保持（技术）熟练；保持（头脑）敏锐 augment 增强、加强 ...
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keep sharp lookout 认真注意瞭望
Keep Sharp Keep Faith TVXQ 强小熊
keep a sharp lookout 严密监视 ; 戒备
keep a sharp eye on 密切注意
keep a sharp lookout for 小心提防
Keep Your Eyes Sharp 将你眼睛放亮
Keep Your Teeth Sharp 唱片名
to keep your brain sharp 锻炼头脑
Keep sharp objects in their proper place. Handle carefully.
保持尖锐的物体在其合适的位置，小心处理。
youdao
Keep sharp lookout for signals of vessel in distress and report.
保持对遇险船信号仔细瞭望并报告。
Alloy steel via heat treatment, grinding blade, enable to keep sharp edge and high precision.
合金钢材质经热处理，研磨修边刀，刀口锋利，精密度高。
Lagat credits Li for designing training plans that keep him sharp without wearing him out.
WSJ: Lagat seeks another record at Millrose Games
Mr Cardoso and the world have also to keep a sharp eye on Congress.
ECONOMIST: No peace for Brazil��s president
Aware of the dangers, pilots keep a sharp look-out for other craft.
ECONOMIST: Africa��s unfriendly skies
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