间: gap, to separate, to thin out (seedlings), to sow discontent...
洽谈: to discuss...
小人: person of low social status (old), I, me (used to refer humbly to oneself), nasty person, vile character...
农民: peasant, farmer...
趁: taking advantage of; availing oneself of...
弊病: malady, evil, malpractice, drawback, disadvantage...
