Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
emission– n. the act of producing or sending out something (such as energy or gas)
courageous– adj.very brave
endorse– v.to agree with
role– n.a part, place or purpose of something
schizophrenic– adj.the qualities of an extreme mental condition
transparent– adj.able to be seen, open
