自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
QUANT 两个;几个 If you refer to a couple of people or things, you mean two or approximately two of them, although the exact number is not important or you are not sure of it.
Across the street from me there are a couple of police officers standing guard...
I think the trouble will clear up in a couple of days.
N-COUNT-COLL 夫妻;情人 A couple is two people who are married, living together, or having a sexual relationship.
The couple have no children.
...after burglars ransacked an elderly couple's home.
N-COUNT-COLL (在某种场合在一起或有某种关系的)一对人，两个人 A couple is two people that you see together on a particular occasion or that have some association.
...as the four couples began the opening dance...
They were an odd couple.
VERB 加上;结合 If you say that one thing produces a particular effect when it is coupled with another, you mean that the two things combine to produce that effect.
...a problem that is coupled with lower demand for the machines themselves...
Overuse of those drugs, coupled with poor diet, leads to physical degeneration...
VERB (把设备等)连接，结合 If one piece of equipment is coupled to another, it is joined to it so that the two pieces of equipment work together.
Its engine is coupled to a semiautomatic gearbox...
The various systems are coupled together in complex arrays.