For now however, the effect is limited to the scientist's test subject, an aquatic plant known as Bacopa caroliniana.
但目前而言，科学家的测试项目仅限于一种叫虎耳草的水生植物。
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Bacopa is one of the few scientifically verified herbal nootropics — a term for supplements shown to have enhancing effects on various aspects of brain function.