[] a lot of sth in one place 集中；聚集◆ insurance premiums for commercial buildings with high concentrations of visitors or workers 为游客或工人很集中的商业大厦投保的保费◆This area has the highest concentration of industry in the country. 这是国内工业集中程度最高的地区。
[] the act of bringing things together, or of coming together, to form a group 集中◆ Concentration of investments in a single company's shares was foolish. 集中投资於一家公司的股票是愚蠢的。◆There is concern about the concentration of ownership in the regional press (= a small number of people or groups own most of the newspapers). 地方报刊所有权的集中令人关注。
[] the ability to direct all your effort and attention on one thing, without thinking of other things 专心；专注◆The job demands total concentration. 这工作需要全神贯注。
[] the process of people directing effort and attention on a particular thing 关注；重视◆Their concentration on developing new markets is starting to bring profits. 他们重视开发新市场的做法正开始给公司带来利润。