英文關鍵字
agriculture
beetle
chemical
color
colorado
crop
environment
equipment
farm
farmer
fertilizer
green
herbicide
human
industry
insecticide
into
kill
machinery
manual
men
nature
non
occupation
opryskovach
outdoors
people
pest
plant
poison
potato
pour
protection
protective
rural
spray
sprayer
spraying
substance
summer
tank
technology
the
tool
toxic
urban
water
weed
white
work
worker
working
workwear