Teeter-totter
n. 跷跷板\\nvi. 上下移动
🧩 词语组成解析
teeter
[['ti:tə]]
vi. 步履不稳地走动, 踉跄, 摇晃, 摇摆不定, 摇摇欲坠, 玩跷跷板\\nn. 踉跄, 摇摆, 跷跷板
totter
['tɔtə]
vi. 蹒跚;踉跄;摇摇欲坠;
n. 蹒跚的步子，动摇，摇晃;
🗣️ 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。
A man cannot whistle and drink at he same time.
一心不能二用。
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。