所有投诉都必须以书面形式提交,方便后续核查。Suǒyǒu tóusù dōu bìxū yǐ shūmiàn xíngshì tíjiāo, fāngbiàn hòuxù héchá.All complaints must be submitted in written form to facilitate later verification.
请把你的意见写成书面材料,明天交给我。Qǐng bǎ nǐ de yìjiàn xiě chéng shūmiàn cáiliào, míngtiān jiāo gěi wǒ.Please write your opinion up as a written document and hand it to me tomorrow.
这个词多用于书面语,平时很少这样说。Zhège cí duō yòng yú shūmiànyǔ, píngshí hěn shǎo zhèyàng shuō.This word is mostly used in written language and is rarely said in everyday speech.