视频对话：
Did you find anything on the foil?
你在锡箔上发现了什么？
Bacon grease and trace amounts of ketchup.
培根油和少量番茄酱。
本期学习词汇：
foil
n.箔，金属薄片；陪衬，陪衬物；（镜底的）银箔，（宝石等的）衬底；（船）翼；花剑
vt.用……陪衬，衬托；铺箔于；[建]给……加上叶形饰；挫败，使受挫折
例句：
1. Pour cider around the meat and cover with foil.
在肉周围倒上苹果酒，然后以箔纸覆盖。
2. He thought of her serenity as a foil for his intemperance.
在他看来，她的平静反衬出了他的放纵。
3. A cold beer is the perfect foil for a curry.
冰镇啤酒是吃咖喱的绝配。
4. A brave police chief foiled an armed robbery on a jewellers' by grabbing the raiders' shotgun.
一位勇敢的警长夺过了意图袭击珠宝店的劫匪手中的猎枪，挫败了这起持械抢劫案。
5. Foil, epee and sabre are the three weapons used in fencing competitions.
花剑，重剑和佩剑三种剑在击剑比赛中使用。