今天我们要学的词是think twice。 Think twice, 三思而后行。"You need to think twice before making the investment," 投资前，最后多想想，考虑清楚。过节送礼能送宠物吗?"Experts say you'd better think twice before giving someone a pet as gift," 专家说，要送宠物给别人，最好事先想好。

圣诞节当天美国发生炸机未遂事件后，机场纷纷加强安检措施。"The new security measures will make air travelers think twice before booking tickets," 新的安全措施会让飞机乘客在订票前再三考虑。好的，今天我们学习的词是think twice...