1.mystery n. 1．谜，秘密2．神秘的事物，不可恩议的事物
be a mystery to someone 对某人来讲是个迷，不明白
A:Larry got a very high mark on his lab report.
B:How he managed that is a mystery to me.
2.power n. 1．能力，精力2．功率，动力，电力3．权力，政权
power failure 停电
例句：The only night I really wanted to watch something and we had a power failure in my building．
3.spark n. 电火花，火星 vi. 发火花，发火星
spark some interest 引起兴趣
A:Did you see the college newspaper? They did a story on our voter registration campaign.
B:I did. Maybe it'll spark some interest on campus. Without more volunteers we'll never meet our goals．
4.wire n. 1．铁丝，电线2．电报，电信
a live wire 有电的电线（指精力充沛的人，活跃分子）
例句：If you want to raise money for the children's hospital, you should put Bill in charge of the fund-raising; he is a real live wire.