Laennec spends the next three years developing and testing various materials and mechanisms before settling on a hollow wooden tube with detachable plug.
在接下来的三年里,Laennec 开发和测试了各种材料和机制,最后选定了带有可拆卸插头的中空木管。
单词 | wooden tube |
例句 |
原声例句
TED-Ed(视频版) Laennec spends the next three years developing and testing various materials and mechanisms before settling on a hollow wooden tube with detachable plug. 在接下来的三年里,Laennec 开发和测试了各种材料和机制,最后选定了带有可拆卸插头的中空木管。 |
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