界限jièxiànboundary; limitHSK 7-9PronunciationjièxiànExample sentence这条河是两个城市之间的天然界限。Zhè tiáo hé shì liǎng gè chéngshì zhī jiān de tiānrán jièxiàn.This river is a natural boundary between the two cities.Read and choose an answerOne fixed sampleExplore a sample