这两种可能性与单词dubious的词源都可以有很好的搭配。
These two possibilities go well with the etymology of dubious.
全钢管骨架结构，搭配专用底盘，安全性国内最高。
Full steel skeleton structure with professional chassis ensures the top safety level.
全钢管骨架结构，搭配专用底盘，安全性国内最高。
Full steel skeleton structure with professional chassis ensures the top safety level.
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