谈论发明创造的表达 — 英语词汇题
题目
根据句意及首字母提示补全单词，并写出其适当形式：1. It took the young scientist years to d______ (研发) a new kind of clean energy device. 2. This smart pen can t______ (把……翻译成) Chinese words into English in seconds. 3. The r______ (结果) of the experiment showed that the invention works well in daily life.