無需多久，無人駕駛飛機送外賣，這個當下鮮為人知的小行業(yè)，將迅速發(fā)展成為一個年銷售額愈千億美元的大產(chǎn)業(yè)。（before） It won't be long before drones deliver takeout，a little-known small industry at present，which will rapidly develop into a large industry with annual sales of more than ＄100 billion.It won't be long before drones deliver takeout，a little-known small industry at present，which will rapidly develop into a large industry with annual sales of more than ＄100 billion.
【考點】固定搭配/句型．
【答案】It won't be long before drones deliver takeout，a little-known small industry at present，which will rapidly develop into a large industry with annual sales of more than ＄100 billion.
【解答】
【點評】
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發(fā)布：2024/4/20 14:35:0組卷：8引用：1難度：0.9
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