Lo and behold, a refrigerator magnet pulled the blob of oil wherever he wanted.

你瞧, 无论他去到那里，冰箱磁铁都可以将油滴剥离。

Sub magnets are really weak, like a lot of refrigerator magnets.

子磁铁确实很弱，就像很多冰箱磁铁一样。