doubling (-over) test

• 折叠试验

英英释义

名词 doubling:

1. increase by a factor of two

2. raising the stakes in a card game by a factor of 2

动词 double:

1. increase twofold

2. hit a two-base hit

3. bend over or curl up, usually with laughter or pain

4. do double duty; serve two purposes or have two functions

5. bridge: make a demand for (a card or suit)

6. make or do or perform again