这位游侠骑士独自骑马穿越森林，寻找机会证明自己的勇气。

The ___knight-errant rode alone through the forest, seeking chances to prove his bravery.

他像个游侠骑士一样，总是为那些被忽视的社会正义事业而战。

He behaves like a ___knight-errant, always championing social justice causes that others ignore.