keeps at短语¹⁰⁶¹⁰⁰⁺⁵ 基本例句 坚持；坚持做下去；纠缠 At present, although internal and overseas scholars carried out many researches, the incidence still keeps at a high level. 虽然国内外学者对小儿肱骨髁上骨折并发肘内翻畸形作了大量的研究及探索，但其发生率一直居高不下； fabiao He always keeps at arm's length with his friends. 他和朋友总是若即若离。 dictall