Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
teenager – n. a person aged between 13 and 19 years.
tournament – n. a series of contests played for a championship
puzzle – n. a question or problem that requires thought, skill, or cleverness to be answered or solved
stimulate – v. to cause or encourage (something) to happen or develop: to make (a person) excited or interested in something
cuddle – v. to hold close for warmth or comfort or in affection
conquer – v. to gain control of (a problem or difficulty) through great effort
