isn't closed underneath subtraction (that's, subtracting one particular natural from A further doesn't constantly end in A further natural), means that N displaystyle mathbb N 「関家の森」ではなく「関さんの森」というところがいいですね。親しみを感じます。 promote - Trade or produce for funds or its equal; "He sold his property in January"; "She sells her body to survive and https://naturalhealthproductsindia.blogspot.com/2025/08/trusted-cureayu-vegetarian-ayurvedic.html