过关斩将的英文：
[Literal Meaning]
pass/fortress/behead/general
to pass the fortress and kill those generals

[解释]
形容不断战胜对手与克服困难。

[Explanation]
to overcome all the difficulties on the way

[例子]
这个二十二岁的美女台球选手一路过关斩将，最后杀入了决赛。

[Example]
That 22-year-old pretty billiard player overcame all the difficulties and entered the final.

[英文等价词]
over the hump