If a line begins to fall behind, they can always increase accuracy and reduce spread.

比如在准星后面增加一条延长线，可以很大程度上提高精度降低散布。

youdao

If a line begins to fall behind, they can always increase accuracy and reduce spread.

比如在准星后面增加一条延长线，可以很大程度上提高精度降低散布。

youdao