tapped是什么意思
问题描述：
tapped是什么意思
答
tapped
[英]['tæpɪd][美]['tæpɪd]
adj.发接触音的;
v.开发( tap的过去式和过去分词 ); （从容器等）汲取（液体）; 割[打]开…取[放]液体; 轻拍,轻敲;
例;The trouble is that,like saltwater,none of these sources is easily tapped.
问题是,这些能源就像海水一样难以开发.