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1. The AACS is a professional organization for the study of astrophysics.
AACS是一个研究天体物理学的专业组织。
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2. The AACS has published numerous papers on the subject.
AACS已经发表了许多关于这个主题的论文。
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3. The AACS is responsible for organizing and conducting scientific conferences.
AACS负责组织和举办科学会议。