字幕表 動画を再生する 英語字幕をプリント Welcome to the Voice of America's news words. In October, thousands of migrants fled their homes in Central America and began walking towards Mexico and the U. S border care of it. Many migrants were traveling to seek asylum in the United States. Some in the caravan walked more than 4000 kilometers after reaching the Mexican town of Tijuana on the US border. Hundreds are still waiting to apply for asylum. In this example, a caravan is a group traveling together on a long journey. Historically, a caravan describes travelers through the desert or hostile areas, often for trade purposes.