第二天，我们一家人来到村农业合作社大门外，看见门外挂了“农业生物研究站”一张小牌子，听到室内传来弟弟的讲话声。
B-Time I-Time I-Time O B-Person I-Person I-Person I-Person I-Person O O B-Location O O O O O B-Location I-Location I-Location O O O B-Location I-Location O O O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O B-Metric I-Metric B-Thing I-Thing I-Thing O O O B-Location I-Location O O B-Person I-Person O O O O O