1·He has some foreign matter in his eye.
他眼睛里有异物。
—— 《新英汉大辞典》
2·This food contains foreign matter.
这食物含有杂质。
3·This salt has been purified of foreign matter.
这些盐已经净化除去了杂质。
4·Nodes filter Bacteria and foreign matter from lymph.
淋巴结从淋巴过滤细菌及外来物质。
5·Metal, oil and soap contains foreign matter, respectively.
金属、油和胰子中辨别含有杂质。
6·Milk is put through a clarifier to remove any foreign matter.
牛奶要经过一个澄清器来除去杂质。
7·Mill scale, rust, paint coatings and foreign matter are removed.
清除掉表面氧化皮、铁锈、油漆等杂质。
8·They are tightly sealed to prevent any foreign matter from getting inside.
它们被紧紧地密封起来，以防止外界东西进入。
9·Dust and other foreign matter can get inside a DSLR when you change lenses.
当你更换镜头的时候，灰尘和其他异物有可以会掉进DSLR的里面。
10·In some applications a metal face-seal may be needed to keep foreign matter out.
在某些应用程序中的金属面密封，可能需要保持异物了。