单次照射 meaning in English

single fraction irradiation

The risk factors are deduced from a single exposure of more than 1 gy and are subject to certain uncertainties . the figures are therefore neither precise nor final . they should be used carefully mindful of their limitations
因此危险度分析是推测性的，所根据的数据和资料主要来源于一戈以上单次照射的结果，而且有一定的不确定性，所以在应用时要留意其局限性，不能视其为精确的或不变的数据。
It should be note that experimental data for dose - effect relationship are still scanty , especially for low doses and low dose rates . the risk factors are deduced from a single exposure of more than 1 gy and are subject to certain uncertainties . the figures are therefore neither precise nor final
因此危险度分析是推测性的，所根据的数据和资料主要来源于一戈以上单次照射的结果，而且有一定的不确定性，所以在应用时要留意其局限性，不能视其为精确的或不变的数据。