【化】 外来杂质; 夹杂物; 异物

滚丝杠的润滑是为了减少摩擦磨损，抵抗腐蚀，冷却，减少外部物质的影响。

foreign language learning

State Bureau of Foreign Experts Affairs (under the Mini stry of Personnel)

foreign short-term claim【金融】

Removal of intraocular foreign body with magnet (embeded)

cif value in foreign currency

foreign body

sino-foreign trade

foreign-oriented