书面许可

书的英语翻译：

book; letter; script; write

面的英语翻译：

face; surface; cover; directly; range; scale; side
【医】 face; facies; facio-; prosopo-; surface

许可的英语翻译：

allow; approbate; permit; consent; admission; licence; permission
【化】 licence
【经】 approbation; authorization; concession; permit