单词：see-saws
音标：['si:sɔ:] ；
n. 跷跷板
vi. 玩跷跷板
adj. 摇摆不定的
vi. 玩跷跷板
adj. 摇摆不定的
单词：see-saws 相关文章
AILSA CHANG, HOST: We've been following for a long time now a story about an invention that could save thousands of Americans every year from really serious accidents. Industry has resisted adopting it. And now, regulators in Washington may take step
发表于:2019-01-16 / 阅读(90) / 评论(0)
2017年NPR美国国家公共电台8月
2017年NPR美国国家公共电台8月