研究的很深入啊,都是美俚啊.
1、write off 【引申：放弃、不管的意思】
例：
we'd better write him off.(口语）
we'll never get the money back.I think we should write it off.
其他意思,参考金山词霸
1）流利地写下,迅速写出
She has written off an account of her trip.
她一口气把旅行见闻写了下来.
2）损失掉,排除
It may not be a bad thing that they write off their marriage before it begins.
他们断绝了关系未结婚,这可能并非坏事.
3）毁掉; 结束掉
They wrote the car off.
他们将那辆汽车报废了.
The plane was completely written off and the pilot died.
飞机全毁,飞行员身亡.
2、cross out 【删除、去掉的意思】这个词组没有什么引申含义,就是本身的词义.
1）勾掉,划掉
He crossed out three wrong words.
他划掉了三个错字.
2）删去,取消,抹掉
Cross the name of the dead person off the list!从名单上删去已故人员的名字.