(木材有光泽的)乔木
Together with PG&E, Silkwood makes it clear that the Court's enthusiasm for preemption in the nuclear area has waned considerably since it affirmed Northern States Power in 1972. 此案与“太平洋煤气电力公司”一案一起清楚地阐明,自从法院在1972年对“北方合众国电力公司”一案维持原判后,在核能地区先占权的热情已经相当低落。