One day Jimmy went down to the pond for a dip，but before he could dive in he spied his teacher，Mrs。Smith，emerging from nude bathing。When Mrs。Smith saw Jimmy，she grabbed the nearest object，which happened to be an old wooden box，and held it in front of her。
“Young man，I know what you are thinking”she said。
“And I know what you are thinking”replied Jimmy。“You are thinking that box has a bottom on it！”
裸泳
吉米去池塘游泳，他扎猛子前刚好看到了他的老师，史密斯夫人，从裸泳中冒出头来。当史密斯夫人看到吉米时，她赶紧抓过最近的一个物体――那碰巧是一个旧的木头盒子，挡在自己前面，说：“年轻人，我知道你在想什么！”“我也知道你在想什么，”吉米回答，“你一定以为这个盒子是有底的！”
skinny[skini]adj。极瘦的，皮包骨的
例：Tom was a lanky boy with long skinny legs。汤姆是一个腿很细的瘦高个儿。
dive[daiv]vi。跳水
例：They dived from the bridge and rescued the drowning woman。他们从桥上跳入水中，救起溺水的妇女。
nude[nju：d]n。（绘画、照片或雕塑）裸体，裸体的
例：They went swimming in the nude。他们去裸体游泳。
bathing[beii]n。洗澡，游泳
例：I need to take my bathing suit。我要去拿我的游泳衣。关于spy的习惯用语有：
spy into刺探，如：It is wrong to spy into people’s affairs。刺探他人的私事是错误的。
spy out秘密地监视，侦察出；辨认出，如：He was sent to spy out enemy positions。他被派去侦察敌人的阵地。
spy upon/on侦察；窥视；监视，如：Jack was paid by the police to spy on his colleagues。杰克受雇于警察在暗中监视他的同事们。
游泳类的英语词汇
breaststroke蛙泳；crawl stroke爬泳；back stroke仰泳；side stroke侧泳；butterfly stroke蝶泳；dolphin butterfly stroke海豚式蝶泳；treading water踩水；underwater swimming潜泳；nonswimmer’s pool浅水池；swimmer’s pool深水池；swimming lane泳道；rope with cork floats水线；touching the finishing line终点触线