Definition
Refers to having some experience or knowledge about certain matters, facts, or information.
些許事情，一點點知識
Don't worry, I know a thing or two about this kind of situation, I know how to handle it.
別擔心，我對這種情況略知一二，我知道如何處理。
Although she looks young, she knows a thing or two about investing.
雖然她看起來年輕，但她對投資略知一二。
I'm not an expert, but I know a thing or two about cooking.
我不是專家，但我對烹飪略知一二。