Prime Minister Keir Starmer of Britain announced his resignation on Monday, bowing to a mutiny inside his party and the threat of a direct challenge to his leadership of the country. 英国首相斯塔默于周一宣布辞职，此举是迫于党内反叛以及其领导地位面临直接挑战的威胁。 Mr. Starmer said he would remain…