The food being good in the communal dinning-room,I polished off in half a jiffy a large plateful of beef and noodle.
The cook had the water hot in a jiffy.
第一个函数会返回当前jiffy，而第二个函数则返回当前值与所传递进来的值之间的差值。
A" jiffy" is an actual unit of time for1/100 th of a second.
It's going up sure. It's like picking up money. We'll double ours in a jiffy.
But in practice DVRs have changed the way many people watch television, by allowing them to ignore the schedules and call up their favourite shows in a jiffy.
In a jiffy he pounced upon it.
Lunch'll be ready in a jiffy.
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