英汉词典

1. 觉察出;知道;了解;辨明
    If you can discern something, you are aware of it and know what it is.

    e.g. You need a long series of data to be able to discern such a trend...
           你需要一长串的数据才能看出这一趋势。
    e.g. It was hard to discern why this was happening.
           很难弄清楚这为什么会发生。

2. 依稀看出;分辨出
    If you can discern something, you can just see it, but not clearly.

discern

    e.g. Below the bridge we could just discern a narrow, weedy ditch.
           我们仅能依稀辨出桥下一条杂草丛生的窄沟。