the most useful invention of all time 是什么意思?

the most useful invention of all time 是什么意思? 英语翻译The Most Useful Invention of All Time?Barbara—Saturday,A The bicycle is one of the simplest but most useful invention The bicycle is one of the simplest yet most useful invention 为什么是"Computers are the second most useful invention of the w Which of these do you think is the most useful invention?中do i think English is most useful of all the subjects. what's the most useful invention?我有急用. The most useful invention to me - 开头的英语作文 英语翻译Invention of glassesWhat is the most important invention i think the most useful invention is (the compeuter)对括号部分提问 what do you think is the most useful invention in the world