Силовые структуры
Assume Bob had a dog “Snoopy” on a leash and it walks along the road, while Bob was standing still. If the dog follows the road once and comes back to Bob, this results in the leash being wrapped around the hole in his space: In other words, Bob would need to walk around the hole once to untangle it.
，这一点在wps中也有详细论述
Number: All the pips in this space must add up to the number.
India allows Iranian warship to dock at Kochi, crew housed at naval facilities