Another way is to keep a small magnet on hand and place the needle on the magnet.

另一种方法是保持手头一块小磁铁，并放置在磁铁针。

youdao

Another way is to keep a small magnet on hand and place the needle on the magnet.

另一种方法是保持手头一块小磁铁，并放置在磁铁针。

youdao