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Think twice. 三思而後行
1. I must think twice before I can promise. 我必須重新考慮一下。
2. Think twice before you say something you might regret later. 三思而後行,不要做後悔的事。
3. To avoid buying unnecessary products, think twice before shopping. 購物時請三思,勿購買過量,既省錢又環保。