单词	回波等强线
释义	回波等强线echo contour
随便看	peripheral interface program peripheral interface program，pip peripheral interface register peripheral interrupt peripheral i/o unit peripheral isolate peripheral isostatic area peripherality peripheralization peripheralize peripheral jet hovercraft peripheral joint of arch dam peripheral limited peripheral link peripheral lowland peripherally peripheral lymphoid organ peripheral lymph sinus peripheral magmareservoir peripheral male peripheral membrane protein peripheral meristem peripheral message processing peripheral milling peripheral moraine