____(experiment) on several times ,this new type of machine will be put into mass production.在线等
问题描述:
____(experiment) on several times ,this new type of machine will be put into mass production.在线等
答
experiment 这个单词的中文是实验,名词又可做动词用,从后半句当中我们可以看到实验的对象是机器,所以前面的答案为过去分词 experimented ,表示被动的含义