位于阿灵顿的美国国家科学教师协会执行理事杰拉尔德·惠勒表示，这份新报告“来得正是时候”。
The new report "couldn't come at a better time", says Gerald Wheeler, executive director of the National Science Teachers Association in Arlington.
约翰-惠勒和诺贝尔奖得主理查德-弗雷曼，他们基于物理体系中时间应该可以倒流的想法，提出了一种反物质理论。
One theory about why antimatter exists was developed by John Wheeler and Nobel laureate Richard Feynman based on the idea that physical systems should be time-reversible.
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