| 单词 | packed structure |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔low-density polyethylene〕A form of polyethylene having many side branches off the main carbon backbone and a less closely packed structure than that of high-density polyethylene.低密度聚乙烯：有许多脱离碳主干边支的聚乙烯，相较于高密度聚乙烯其它结构较松散美国传统 |
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