That word "similar" is useful. I might say, "my brother and I are similar." Or "quite similar." or "very similar." Or I might say, "I am like" my brother, or I "look like" my brother. That means we are similar, or we look similar.
「相似」這個詞很有用。我可以說:「我的哥哥和我很相似。」或「蠻相似」或「非常相似。」或者我可以說:「我像」我的哥哥,或我「看起來像」我哥哥。這意味著我們很相似,或者我們看起來很相似。