顺势: to take advantage, to seize an opportunity, in passing, without taking extra trouble, conveniently...
热潮: upsurge, popular craze...
私下: in private...
粗糙: crude, gruff, rough, coarse...
辈: lifetime, generation, group of people, class, classifier for generations, (literary) classifier for people...
变故: an unforeseen event, accident, misfortune...
原料: raw material...
谦虚: modest, self-effacing, to make modest remarks...
防范: to be on guard, wariness, to guard against, preventive...
邻国: bordering country, neighbor country, neighboring countries, surrounding countries...
