1 . 最困难的事情是发现人们需要什么,并解决现实世界的问题。(real-world)
The most difficult thing is finding out what people need and________ .
The most difficult thing is finding out what people need and
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2022-09-14更新
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2卷引用:北师大版(2019) 必修二 Unit 4 Lesson 2 Apps