stack sandbags 堆放沙袋
sandbagging technique 掩饰技巧
fill with sandbags 装满沙袋
A: We need to use sandbags to reinforce the dam.
A：我们需要用沙袋来加固大坝。
B: Do you think he is sandbagging to get a higher ranking?
B：你认为他是为了获得更高的排名而故意表现失常吗？
1) 装满沙子的袋子
2) 故意降低表现以迷惑对手
3) 掩饰真实实力
1. 沙袋
2. 故意表现失常以迷惑他人
noun
1. A bag filled with sand, used for weight or protection.
verb
1. To intentionally underperform to deceive an opponent.
Synonym: deceive, bluff