问题描述：
英语-谁能告诉我---这两句话有什么区别
原文段：The trail of non-biodegradable litter international tourists leave behind them and the vast amounts of fossil fuel consumed in transportation pose grave environmental threats to the tourist destinations and beyond.
The trail of non-bi litter which tourists leave hehind and...
原文段：The trail of non-biodegradable litter international tourists leave behind them and the vast amounts of fossil fuel consumed in transportation pose grave environmental threats to the tourist destinations and beyond.
The trail of non-bi litter which tourists leave hehind and...
问题解答：
我来补答展开全文阅读