Word: 在于 (zàiyú) Traditional: 在於 在于 dictionary entry zàiyú to rest with; to be determined by Full dictionary entry for 在于 Example sentences using 在于 2 sentences, showing page 1 of 1. 冬天的好处在于没有蚊子。 Dōngtiān de hǎochù zàiyú méiyǒu wénzi. The good thing about winter is that there are no mosquitos. 学中文最困难的部分在于汉字。 Xué Zhōngwén zuì kùnnan de bùfen zàiyú hànzì. The hardest part of learning Chinese is the Chinese characters.