定义
to drop (something): 落下,掉落 
            
            
Don't drop the soap.别把肥皂弄掉了。
I dropped my watch in the toilet and it doesn't work anymore.我把手表掉进马桶里了,它再也不走了。
Can we drop the subject?  我们能换个话题吗?
to drop (something or someone) off: 把(某物或某人)留下,让(某人)下车 
            
            
I have to drop my mom off in town before I go to the pub. 我去酒吧前要先把我妈妈送到城里去。
a drop (off): 减少 
            
            
The stock prices saw a sharp drop-off in the third quarter. 第三季度的股票价格明显下跌。
to drop 59%: 减少了59% 
            
            
Pronunciation examples
            UK: Could you drop me off at the mosque on your way to church?
US: Never, ever drop the soap in a prison shower.
- "Apparently we've just hired a new sales assistant, and I wonder if the drop in sales might have to do with him. His name's Spencer, and he has a confusing voice."
 - "Klaus : Yes, drop us here and wait for us."
 - "The stock just dropped half of a point while we were talking!"
 - "Horatio : ...then you drop."
 - "The Perfume Hut has seen a drop-off in sales of Delavigne perfumes recently, and our management has expressed some doubts about the potential for your products in our stores."
 - "Philip : Ok, sales people, drop the phones for a minute and gather round the Sales King - me!"
 - "I think you've dropped a sheet of paper."
 - "And as you must know, since those figures were published this morning, our stock has already dropped 5.67 points as of 3:20 pm New York time, according to my Raspberry portable device."
 - "I'd like you to drop your pants."
 

