单词	21-三体
释义	21-三体医trisomy 21
随便看	SteelStructores steel structural Steel Structural steel structural charge shed steel structural components steel structural damage detection steel structural derrick steel structural embedded parts steel structural frame steel structural hull steel structural member steel structural microwave communication tower steel structure in high-rise buildings steel structure installation steel structural part steel structural plate steel structural residence steel-structural residence steel structural roof steel-structural system steel structure steel-structure Steel-structure steel st ructure steel structure anticorrosion