TPO上的几个难句，求翻译

cassie1214UID: 3333863

1.The exchanges with the atmosphere are calculated by finding the difference between the gains from rain,as measured by ram gauges,and the losses by evaporation measured with models that correct for the other sources of water loss.


2.Changes in lake level not explained by river flows plus exchanges with the atmosphere must be due to the net diffenrence between what seeps into lake from groundwater and what leaks into the groundwater.


3.Few of the cultural traditions and rules that today allow us to deal with dense populations existed for these people accustomed to household autonomy and the ability to move around the landscape almost at will.

句子的结构  昏 ？？


4.Lesley Maynard the archaeologist who coined the phrase "Panaramitee style",suggested that a sequence could be determined far Australia rock art in which a geometric style gave way to  a simple figurative style,follwed by a range of complex figurative styles that,unlike the Pan--Australian geometric tradition tended to much greater reginal diversity.



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特别是句子结构  搞不太懂啊

zpx2227UID: 3149712

1.  The exchanges are calculated by finding the difference between gains and losses.

2.Changes in lake level must be due to the difference between.....and..... .

3.Few of the cultural traditions and rules existed for these people.

第四句  你抄对了吗？？  读不懂~~~~~   楼下继续