natural cycle/amn

41.   Van Sommeran contends that the decline is too steep to be explained by natural cycles.

a. + cycle >>共 494 个
economic 9.96%
menstrual 6.56%
vicious 5.84%
new 3.46%
natural 2.44%
endless 1.91%
previous 1.85%
current 1.79%
reproductive 1.73%
next 1.43%
natural + n. >>共 838 个
disaster 6.84%
cause 3.94%
world 2.04%
habitat 2.04%
beauty 2.03%
light 1.67%
environment 1.17%
process 1.07%
order 0.94%
phenomenon 0.87%
cycle 0.39%
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