This could then help the immune system work more effectively , researchers told the british psychological society conference in stoke - on - trent 研究者们在斯托康川特举行的英国心理学会大会上提出，这样做能够提高免疫系统的工作效率。
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Schools in england and wales are competing to win an environmental prize by entering a competition to create a promise tree in support of promise the earth the greenfilm festival , an evening of films and discussion about the environment and filmmaking in stoke - on - trent 为响应“向地球保证”这一活动，英格兰和苏格兰地区的学校开展了种植许诺树的竞赛活动，比赛优胜者将荣获环境奖。
