widenvt.加宽；使变宽；扩大vi.变宽widening investment扩大投资范围widening of the ring环扩大widening engineering扩建工程Widen forbidden band禁带宽度widening of subgrade路基加宽Widening improvement拓宽改造widen the difference拉开档次widening differences分歧扩大; 分歧越来越大widening of the band扩大变动幅度widen one's knowledge扩充知识