Gleanings are small bits of information you have picked up one by one, and it was not easy. Nobody handed you the whole story. You listened here, read a little there, maybe asked around, and at the end you only have pieces. People often say “a few gleanings” after slow, careful looking — a reporter after a long day with little to show, or a student who has read a hard book and come away with only a handful of clear facts. The word feels a little old and a little bookish; you will meet it more in writing than in chat. Though actually, it started with farming: after the harvest, poor people were allowed to walk the field and pick up the leftover grain. That leftover picking was gleaning. So when we talk about gleanings of information, we are borrowing that picture — you did not get the whole crop; you got what was left, and you had to work for it. You will nearly always see it in the plural. One lone “gleaning” is possible, but “gleanings” is the shape people use.

蒐集到的點滴（資訊、消息）