名词 extravert:

1. (psychology) a person concerned more with practical realities than with inner thoughts and feelings

extra-表在外, 外面extraadj.额外的n.额外之物；临时演员adv.特别地extra light flint特轻火石玻璃extra heavy sheet特重厚玻璃板extra dense flint特重火石玻璃extra long staple特长绒棉,超级长绒extragalactic jet河外喷流extracular muscle眼球外肌extra-limy slag特强石灰炉渣extranuclear gene核外基因extra print order附加打印指令extra oxygen unit额外的氧气单元