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。
2
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.