They cancel each other out. So, you know, The frontal of the fighting has been borned by the US, the UK, Canada, France, Holand and Denmark.

他们相互抵消了，前线战争是由,美国，英国，加拿大，法国，荷兰，丹麦。

普林斯顿公开课 - 国际座谈会课程节选

The two sources of charge cancel each other out.

两个电荷源互相抵消。

麻省理工公开课 - 固态化学导论课程节选