基本解释放牧蜂群英汉例句雙語例句Not until the 1920s when cars and trucks became affordable and roads improved, did migratory beekeeping begin to catch on.直到19世紀20年代儅汽車和卡車比較經濟和道路改善， 遷移養蜂開始流行。migratory beekeeping更多例句词组短语短語beekeeping migratory 轉地放蜂migratory beekeeping更多词组