英汉词典

1. （使）变宽;（把…）加宽
    If you widen something or if it widens, it becomes greater in measurement from one side or edge to the other.

widen

    e.g. He had an operation last year to widen a heart artery...
           去年他接受了一个扩张心脏动脉的手术。
    e.g. The river widens considerably as it begins to turn east.
           河流转向东流时河道大幅度变宽。