Both “Good At” and “Good In” are correct, but they should be used to indicate different abilities, skills, or performances. “Good At” should indicate someone is always good at an …
Ⅰ . be good at / in 意思接近于 do well in. “在（某方面）出色；擅长……”。 be good at / in 强调一种笼统情况，而do well in 可表示一种情况，也可指在具体的一次活动中表现出色。 be good at 的反义词组 …
Understanding when to use good at and good in is key to mastering English. Use good at before a verb to talk about skills. For example, “She is good at painting.” This means she has talent …
be good at和be good in的区别是：be good in是表现良好，有效果，但be good in 极少作固定短语，后接名词。 擅长于某事，at后接名词或动名词，即动词加ing。 Alex is very good at languages。
Generally, someone is good at doing something. On the other hand, someone is [simply] good in something. However, depending on which dialect you are speaking in, it depends. For instance, …
更多内容请点击：Good at or Good in? When to Use Each (With Examples) - Grammarhow