这份旧资料虽然年代久远,但对研究项目仍有用处。Zhè fèn jiù zīliào suīrán niándài jiǔyuǎn, dàn duì yánjiū xiàngmù réng yǒu yòngchù.Although this old material is from long ago, it is still useful for the research project.
这个小工具用处很多,每个家庭都应该有一个。Zhè ge xiǎo gōngjù yòngchù hěn duō, měi ge jiātíng dōu yīnggāi yǒu yí ge.This little tool has many uses, and every household should have one.
你别扔掉那些旧瓶子,说不定以后有用处。Nǐ bié rēng diào nàxiē jiù píngzi, shuōbudìng yǐhòu yǒu yòngchù.Don't throw away those old bottles; they might be useful later.