41.   The said they believed the damage was caused by exposure to combinations of low-level nerve gas, anti-nerve gas tablets, pesticides and DEET-containing insect repellents.

42.   These include products in flea and tick collars, anti-nerve gas medication, and insect repellent.

a. + repellent >>共 21
insect 60.87%
natural 7.25%
animal 2.90%
effective 2.90%
good 2.90%
american-made 1.45%
chemical 1.45%
citronella-based 1.45%
commercial 1.45%
common 1.45%
insect + n. >>共 172
pest 10.11%
bite 8.82%
repellent 7.72%
infestation 4.78%
larva 4.04%
damage 3.31%
species 3.31%
population 3.13%
life 2.57%
problem 2.02%
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