Unit 8
stand for 代表
prefer doing to doing 喜欢做某事而不喜欢做某事
every four years 每四年
the same as 和......相同，
in modern (ancient)times 在现代(古代)
join in 参加
do ones best to do sth. 努力做某事
in track and field 在田径比赛中
in preparation for 为.......而准备
have good(bad) effects on 对...有正(负)面作用
tens of thousands of 几十万
encourange sb. to do sth. 鼓励某人做某事
take exercise 进行锻炼：，
at the opening of 在......开幕式上
by hand 手工
take care of 照顾
spendon 在......花钱（时间）
more than 不仅仅
have a chance to do sth． 有机会做某事