1.a series of 一系列的
例句:Boom! Boom! Boom! A series of explosions shook the valley.
轰!轰!轰! 一连串爆破声震撼山谷
。2.take over 接管
例句:He will take over Class 9801 next week.
下星期他将接管 9801 班
。3.world records 世界纪录
例句:He set the racing world on its ear by breaking eight world records.
他创造了8项世界纪录使径赛界人士大为惊讶.
4.on board 加入
例句:She came on board in the late Sixties and spent two decades with the agency.
她于六十年代末加入,在这个机构干了二十年
。