double-cross

vt. 欺骗, 出卖

名词:double-crosser 动词过去式:double-crossed 过去分词:double-crossed 现在分词:doublecrossing 第三人称单数:double-crosses 

dou.ble-cross

v.tr.（及物动词）
dou.ble-.crossed,dou.ble-.cross.ing,dou.ble-.cross.es
To betray by acting in contradiction to a prior agreement.See Synonyms at deceive
背弃：行为上背弃先前的协议参见 deceive
n.（名词）
Often double cross An act of betraying an ally, a friend, or an associate.
常作 double cross 叛变：叛变联盟、朋友、伙伴等的行为
double cross Genetics A cross in which each parent is the product of a single cross. It can be represented as AB × CD, where A, B, C, and D are inbred lines.
double cross 【遗传学】 双杂交：上代双方都是单杂交产物的杂交，可用AB×CD表示，其中A、B、C和D是近交品系

【引伸】
dou.ble-cross.er
n.（名词）