瓜子: melon seed, seeds of pumpkin, watermelon or sunflower etc, roasted and flavored, consumed as a snack...
风土人情: local conditions and customs (idiom)...
主导: leading, dominant, prevailing, to lead, to direct, to dominate...
样品: sample, specimen...
辩证: to investigate, dialectical...
接到: to receive (letter etc)...
触目惊心: shocks the eye, astonishes the heart (idiom); shocking, horrible to see, a ghastly sight...