磁异常
magnetic anomaly (geology)
到此一游
to travel (somewhere); (vandalism) 'was here'
多此一举
to do more than is required (idiom); superfluous; gilding the lily
彼一时此一时
that was one thing, and this is another; times have changed
成败在此一举
win or lose, it all ends here; this is the moment to shine