Conner: I wish I could give more. I know $100 is a drop in the bucket compared to what they need.
Mary: It's still generous of you. Yeah, we need to raise about $10 million, but if more people give, it'll really make a difference to a lot of sick kids.
Meaning: The expression "a drop in the bucket" means that something is very small when compared to what is necessary. In the example above, Conner has given Mary a donation for children's hospital, but he realizes that compared with the $10 million necessary, it seems almost worthless (which Mary denies).
Second Example:
When the employees found out how much money the company had made without giving any raises or bonuses, the employees were furious. They argued that a small raise for each employee would have been a drop in the bucket when compared with the record profits, but the company argued that they were investing the profits to ensure future growth.
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