词汇	needle threaders
释义	needle threaders 穿针器
随便看	second har-monic generation property second harmonic generation, SHG second-harmonic generationshgintegration second-harmonic generation shg integration second harmonic generator second harmonic generatorSHG second harmonic imaging second harmonic laser second harmonic magnetic modulator second head of triceps brachii muscle second head rice second heads rice second health second health condition Second healthy appearance second heart second heart sound second heart sound,aortic component second heart sound,pulmonic component second heart sound, S2 second heart spring second heat Second heating treatment second helping second helpings