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重点讲解：
1. wrapped in 被…所笼罩
例句：His mother went into the house and brought back his daughter , wrapped in a blue blanket .
他母亲走进屋内，将他的女儿裹在蓝毯子里抱了出来
2.in the soil 土壤中
例句：It'd difficult for the plastic bags to break down in the soil.
塑料袋在土壤中分解非常困难。
3.be supposed to 应该...
例句："The law is supposed to be the bottom line of a society, " he said.
“法律应该是一个社会的底线，”他说。
4.lose contact with 失去联系
例句：I've lose contact with most of my school friends.
我跟大多数同学已经失去了联系。
