Double cross:

雙十字路口 ×

欺騙，出賣 √

例句：

After he double-crossed his best friend, everyone gave him the cold shoulder.

在他出賣了最好的朋友后，每個(gè)人都待他十分冷淡。

Double crosser: 

騙子

例句：

Don't trust her any more. She is a double crosser.

不要再信她，她是個(gè)騙子。

Chinese wolfberry:

中國(guó)的狼果子 ×

枸杞 √

例句：

Chinese wolfberry is good for our health.

枸杞養(yǎng)身。