Teeters
n. 踉跄( teeter的名词复数 ); 摇摆; <美>跷跷板; <鸟>斑鹬\\nv. 摇晃地站立或移动( teeter的第三人称单数 ); <美>玩跷跷板; 处在（灾难或危险的）边缘; 濒临
🗣️ 情景例句
Tom gave Helen an apple in exchange for a piece of cake.
汤姆用一个苹果和海沦换一块蛋糕。
He was pale with fear.
她吓得脸色刷白。
Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing.
藏书使教育成为可能，而教育反过来又丰富了藏书，因为知识的增长遵循着一种“滚雪球”的规律。印刷术的发明又大大提高了知识增长的速度。