He was determined to track down the cause of food spoilage.
他决心查出食品腐

因。
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(英语一)
8
演讲综合 Today, we're headed to the rainforest hinterlands of the Gold Coast in Queensland, Australia, where a scientist is using a network of sound recording devices and artificial intelligence to track down an endangered and elusive species of bird.
今天,我们会前往澳大利亚昆士兰黄金海岸的热带雨林腹地,在那里,一名科学家正在使用录音设备网络和
工智能来追踪一种濒危且难以接近的鸟类。