Apopo, a Belgian de-mining research group train rats and their handlers, saying that the animals have a highly developed sense of smell, are easy to tame and train and cheap and easy to maintain.是什么意思_Apopo, a Belgian de-mining research group train rats and their handlers, saying that the animals have a highly developed sense of smell, are easy to tame and train and cheap and easy to maintain.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句