担任: to hold a governmental office or post, to assume office of, to take charge of, to serve as...
熟人: acquaintance, friend...
含糊: ambiguous, vague, careless, perfunctory...
紧张: nervous, keyed up, intense, tense, strained, in short supply, scarce...
注意: to take note of, to pay attention to...
变故: an unforeseen event, accident, misfortune...
板块: slab, (geology) tectonic plate, sector (of the stock market or of industry), (economic) bloc...