around round 
作介詞用的around與round通?？梢曰Q,只不過美語常用around,而英語常用round,
例如：You can see the post office round/around that corner. (繞過那個彎你就可以看到郵局.但是一定要區(qū)別它們的不同之處：round可以用作形容詞、副詞、介詞、動詞、名詞；而around只能用作副詞或介詞.
例如：The post office is just round (around) the house (用作介詞). He has round face (用作形容詞). The river rounded the stones. (用作動詞)