foreign matters

基本解释

We have also introduced a new processing machine to separate tiny foreign matters from the roasted coffees.
我们更引进一台设备用以分隔混在咖啡豆内的外来物质。
chinafanyi.com
The filtering device can filter the foreign matters in the water while washing, and can be mounted to or dismounted from the washing machine easily.
本发明在对洗涤物进行洗涤时，能够有效的过滤洗涤水中含有的异物质，并且与洗衣机之间的装卸比较容易的洗衣机的过滤装置。
ip.com
If any packing materials that may easily produce foreign matters are used to pack the cotton, the Seller shall bear all the expenses for the cleaning of foreign matters.
如果使用容易产生异性纤维的包装材料包装棉花，则卖方须承担全部清理异性纤维的费用。

The Lib Dems are passionate about their pro-Europeanism, their liberal take on crime and their dovishness on military and foreign matters.
ECONOMIST: The new coalition government
Add in the idea that the election will be fought at a time when (for once) voters are concerned about foreign matters in a way that should help the president, and you can see why the Republicans are confident.
ECONOMIST: Party politics
After decades of facing inwards, Indian universities, think-tanks and commentators are only just beginning to show an interest in foreign matters beyond Pakistan, so as yet there is only a small corps of experts outside government to help advise policymakers.
ECONOMIST: India abroad