“催化”
用英语怎么说？

Geopolitical crises have also catalyzed the BBC's audience expansion, with regional services experiencing dramatic surges in readership and viewership. Following the escalation of conflict in Ukraine, the BBC News Ukrainian service witnessed its reach more than triple, engaging more than one in five Ukrainian adults on average through its social media accounts. Similarly, amidst ongoing tensions involving Iran, audiences have relied heavily on BBC News Persian, which currently reaches nearly 25 million people, cementing its role as the preeminent Persian-language media outlet outside Iran. Meanwhile, BBC News Brasil and BBC News Mundo experienced exponential growth, surging by 58 percent and 40 percent respectively. This expansion was predominantly driven by innovative social media strategies on platforms like TikTok and Instagram, reflecting the broadcaster’s agility in tailoring content for younger, digitally-native demographics in Latin America.

地缘政治危机也催化了 BBC 的受众扩张，区域服务在阅读量和收视率方面经历了戏剧性的飙升。随着乌克兰冲突的升级，BBC 乌克兰新闻服务的覆盖范围增加了一倍以上，通过其社交媒体账号平均吸引了超过五分之一的乌克兰成年人。同样，在涉及伊朗的持续紧张局势中，受众严重依赖 BBC 波斯语新闻，该服务目前覆盖近 2500 万人，巩固了其作为伊朗境外最主要波斯语媒体机构的角色。与此同时，BBC 巴西新闻和 BBC 西班牙语新闻（Mundo）经历了指数级增长，分别飙升了 58% 和 40%。这一商业扩张主要是由 TikTok 和 Instagram 等平台上的创新社交媒体策略推动的，反映了该广播机构在为拉美地区更年轻、数字原生的受众量身定制内容方面的敏捷性。