Half life time, simulated by a dispersion model, can represent the exchange ability of an area more completely and objectively.

认为以水质模型模拟半交换时间研究海域的水交换能力更全面、客观。

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Ron looked both sulky and annoyed when he appeared at breakfast half an hour later, and though he sat with Lavender, Harry did not see them exchange a word all the time they were together.

罗恩半小时后来吃早饭时，显得很恼火。虽然他和拉文德坐在一起，但哈利没见他们说一句话。

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The rows continued as the teams went down the tunnel at half-time with Derry boss Stephen Kenny involved in a heated exchange.

BBC: SPORT | Football | Irish | Linfield 3-1 Derry City