secondary obstruction是什么意思 secondary obstruction怎么读
secondary obstruction的相关资料
secondary obstruction的用法和样例
- The road was cleared from obstruction.
那条路已被清除了障碍。 - The filibuster was a major obstruction to the success of their plan.
议事阻挠是他们的计划取得成功的主要障碍。
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