Translation of "to glean" into Chinese

On arrival in Bethlehem, Ruth obtains Naomi’s permission to glean in the barley harvest.

到了伯利恒,路得征得拿俄米同意在收割的季节拾大麦的遗穗。

However, it had proved difficult to glean information from African States and organizations.

不过,事实证明难以从非洲国家和组织收集资料。