单枪匹马的英文：
[Literal Meaning]
single/spear/single/horse
a solitary orse and a single spear

[解释]
单独行动，一个人奋战

[Explanation]
single-handed

[例子]
这件事需要我们大家一起努力，光靠你单枪匹马是不行的。

[Example]
For this we need to work together and it will fail if you are single-handed.

The scout single-handedly penetrated behind the enemy's rear lines
侦察员单枪匹马深入敌后。

I had met the challenges of solo travel in an extreme climate.
我已经面对了在极限气候下单枪匹马旅行的挑战。

I couldn't do maths in isolation.
我不可能单枪匹马去研究数学。

Give yourself credit for having the strength to admit that you can not always do it alone no one can.
如果你有勇气承认自己不可能总是单枪匹马做好事情--谁都不能--要认为这是自己的优点。