Extraneous matter
[化] 外来杂质; 异物
🧩 词语组成解析
matter
['mætɚ]
n. 事件;（讨论、考虑等的）问题;重要性;物质;
vi. 要紧，重要;化脓;有重大影响;有重要性;
🗣️ 情景例句
the plans for the community center
这项修建社区中心的计划
The newsboy throws his papers in the wrong place.
报童把报纸投错了地方。
I've never met him but I've talked to him on the net.
我没见过他，但我和他在网上聊过天。