vt.& vi.集中; 專心於; 注意; 聚集
vt.濃縮，（使）濃縮; [採礦]汰選; 選礦，精選，富集
It was up to him to concentrate on his studies and make something of himself.
Italy's industrial districts are concentrated in its north-central and north-eastern regions.
A term in prison will concentrate his mind wonderfully.
Water companies should concentrate on reducing waste instead of building new reservoirs.
At work you need to be able to concentrate.