She uses her cane to rummage through the dump and pick out plastic bags and bottles to exchange for money in order to pay for her children's schooling.
用拐杖扒垃圾堆，然后有塑胶袋塑胶瓶她就捡起来，然后换钱供她那些小孩读书。
The more holes on plastic cylinder, the greater the heat exchange to the air in greenhouse.
塑料筒上放热孔的数量越多，其与温室空气的换热量也越大。
The more holes on plastic cylinder, the greater the heat exchange to the air in greenhouse.
塑料筒上放热孔的数量越多，其与温室空气的换热量也越大。
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