The value of the current letter, written in the (a | a) format.

用(a | a)格式写的当前字母的值。

youdao

Assign a direction and a letter to each unknown current.

请对每个未知电流标以方向和字母记号。

youdao

Assign a direction and a letter to each unknown current.

请对每个未知电流标以方向和字母记号。

youdao