Back when he was doing farm vehicle R & D, it would take at most several weeks to finish a project. But this time, as he tried to add just one more wheel to an electric mobility scooter, he was, to his surprise, unable to finish the task even after spending several months on it.
大出他意料的是，以往研發農業機械車，頂多幾星期就可以搞定，但這次想為電動代步車多加一個輪子，居然讓他耗掉幾個月時間還弄不出來。