集中（focus的过去式和过去分词）（使）调节焦距（focus的过去式和过去分词）双语释义：v.(动词)vt. & vi. (使)集中concentratevt. & vi. 聚集于 come together at a focus; adjust an instrument, etc. so that it is in focusvt. & vi. 调整(镜头,眼睛)焦点或焦距以便看清 adjust (a lens, the eye, or lens-like device) to make a cle